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13902071 = 79717443
BaseRepresentation
bin110101000010…
…000011110111
3222011022001112
4311002003313
512024331241
61213545235
7226110551
oct65020367
928138045
1013902071
117935917
1247a521b
132b599a1
141bbc4d1
1513491eb
hexd420f7

13902071 has 4 divisors (see below), whose sum is σ = 13920312. Its totient is φ = 13883832.

The previous prime is 13902061. The next prime is 13902079. The reversal of 13902071 is 17020931.

13902071 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: 17020931 = 17995089.

It is a cyclic number.

It is not a de Polignac number, because 13902071 - 214 = 13885687 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 (13902079) 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, 7925 + ... + 9518.

It is an arithmetic number, because the mean of its divisors is an integer number (3480078).

Almost surely, 213902071 is an apocalyptic number.

13902071 is a deficient number, since it is larger than the sum of its proper divisors (18241).

13902071 is an equidigital number, since it uses as much as digits as its factorization.

13902071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18240.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 13902071 is about 3728.5481088488. The cubic root of 13902071 is about 240.4509519144.

The spelling of 13902071 in words is "thirteen million, nine hundred two thousand, seventy-one".

Divisors: 1 797 17443 13902071