13697725 has 6 divisors (see below), whose sum is σ = 16985210. Its totient is φ = 10958160.

The previous prime is 13697701. The next prime is 13697729. The reversal of 13697725 is 52779631.

It can be written as a sum of positive squares in 3 ways, for example, as 324 + 13697401 = 18^2 + 3701^2 .

It is a de Polignac number, because none of the positive numbers 2^k-13697725 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13697729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 273930 + ... + 273979.

Almost surely, 2^13697725 is an apocalyptic number.

It is an amenable number.

13697725 is a deficient number, since it is larger than the sum of its proper divisors (3287485).

13697725 is an equidigital number, since it uses as much as digits as its factorization.

13697725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547919 (or 547914 counting only the distinct ones).

The product of its digits is 79380, while the sum is 40.

The square root of 13697725 is about 3701.0437716947. The cubic root of 13697725 is about 239.2670055067.

The spelling of 13697725 in words is "thirteen million, six hundred ninety-seven thousand, seven hundred twenty-five".