31696691 has 16 divisors (see below), whose sum is σ = 35852544. Its totient is φ = 27803424.

The previous prime is 31696667. The next prime is 31696699. The reversal of 31696691 is 19669613.

It is a cyclic number.

It is not a de Polignac number, because 31696691 - 2¹⁴ = 31680307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31696699) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67640 + ... + 68106.

It is an arithmetic number, because the mean of its divisors is an integer number (2240784).

Almost surely, 2^31696691 is an apocalyptic number.

31696691 is a deficient number, since it is larger than the sum of its proper divisors (4155853).

31696691 is a wasteful number, since it uses less digits than its factorization.

31696691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730.

The product of its digits is 52488, while the sum is 41.

The square root of 31696691 is about 5629.9814386905. The cubic root of 31696691 is about 316.4739556313.

The spelling of 31696691 in words is "thirty-one million, six hundred ninety-six thousand, six hundred ninety-one".