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13931101 = 73190837
BaseRepresentation
bin110101001001…
…001001011101
3222012202212201
4311021021131
512031243401
61214331501
7226261312
oct65111135
928182781
1013931101
117955708
1247b9b91
132b69c72
141bc8d09
151352b01
hexd4925d

13931101 has 4 divisors (see below), whose sum is σ = 14122012. Its totient is φ = 13740192.

The previous prime is 13931089. The next prime is 13931111. The reversal of 13931101 is 10113931.

It is a happy number.

13931101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10113931 = 73138547.

It can be written as a sum of positive squares in 2 ways, for example, as 4622500 + 9308601 = 2150^2 + 3051^2 .

It is a cyclic number.

It is not a de Polignac number, because 13931101 - 25 = 13931069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13931111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95346 + ... + 95491.

It is an arithmetic number, because the mean of its divisors is an integer number (3530503).

Almost surely, 213931101 is an apocalyptic number.

It is an amenable number.

13931101 is a deficient number, since it is larger than the sum of its proper divisors (190911).

13931101 is an equidigital number, since it uses as much as digits as its factorization.

13931101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190910.

The product of its (nonzero) digits is 81, while the sum is 19.

The square root of 13931101 is about 3732.4390149070. The cubic root of 13931101 is about 240.6182036873.

The spelling of 13931101 in words is "thirteen million, nine hundred thirty-one thousand, one hundred one".

Divisors: 1 73 190837 13931101