13697831 has 8 divisors (see below), whose sum is σ = 16194720. Its totient is φ = 11335968.

The previous prime is 13697791. The next prime is 13697833. The reversal of 13697831 is 13879631.

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

It is a de Polignac number, because none of the positive numbers 2^k-13697831 is a prime.

It is a super-2 number, since 2×13697831² = 375261148209122, 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 (13697833) 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, 33536 + ... + 33941.

It is an arithmetic number, because the mean of its divisors is an integer number (2024340).

Almost surely, 2^13697831 is an apocalyptic number.

13697831 is a deficient number, since it is larger than the sum of its proper divisors (2496889).

13697831 is an equidigital number, since it uses as much as digits as its factorization.

13697831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67513.

The product of its digits is 27216, while the sum is 38.

The square root of 13697831 is about 3701.0580919515. The cubic root of 13697831 is about 239.2676226952.

The spelling of 13697831 in words is "thirteen million, six hundred ninety-seven thousand, eight hundred thirty-one".