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13760981 = 137091493
BaseRepresentation
bin110100011111…
…100111010101
3221220010111222
4310133213111
512010322411
61210540125
7224652323
oct64374725
927803458
1013760981
117849913
124737645
132b0a6c0
141b82d13
15131c4db
hexd1f9d5

13760981 has 8 divisors (see below), whose sum is σ = 14850360. Its totient is φ = 12676032.

The previous prime is 13760963. The next prime is 13760987. The reversal of 13760981 is 18906731.

It can be written as a sum of positive squares in 4 ways, for example, as 555025 + 13205956 = 745^2 + 3634^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13760981 - 26 = 13760917 is a prime.

It is a super-2 number, since 2×137609812 = 378729196164722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13760987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8471 + ... + 9963.

It is an arithmetic number, because the mean of its divisors is an integer number (1856295).

Almost surely, 213760981 is an apocalyptic number.

It is an amenable number.

13760981 is a deficient number, since it is larger than the sum of its proper divisors (1089379).

13760981 is a wasteful number, since it uses less digits than its factorization.

13760981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2215.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 13760981 is about 3709.5796257797. The cubic root of 13760981 is about 239.6347511336.

It can be divided in two parts, 13760 and 981, that added together give a palindrome (14741).

The spelling of 13760981 in words is "thirteen million, seven hundred sixty thousand, nine hundred eighty-one".

Divisors: 1 13 709 1493 9217 19409 1058537 13760981