13231697 has 4 divisors (see below), whose sum is σ = 13245540. Its totient is φ = 13217856.

The previous prime is 13231679. The next prime is 13231703. The reversal of 13231697 is 79613231.

It is a happy number.

13231697 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.

It can be written as a sum of positive squares in 2 ways, for example, as 9247681 + 3984016 = 3041^2 + 1996^2 .

It is a cyclic number.

It is not a de Polignac number, because 13231697 - 2⁶ = 13231633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13231667) 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, 5372 + ... + 7437.

It is an arithmetic number, because the mean of its divisors is an integer number (3311385).

Almost surely, 2^13231697 is an apocalyptic number.

It is an amenable number.

13231697 is a deficient number, since it is larger than the sum of its proper divisors (13843).

13231697 is a wasteful number, since it uses less digits than its factorization.

13231697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13842.

The product of its digits is 6804, while the sum is 32.

The square root of 13231697 is about 3637.5399654162. The cubic root of 13231697 is about 236.5221668558.

The spelling of 13231697 in words is "thirteen million, two hundred thirty-one thousand, six hundred ninety-seven".