31696457 has 18 divisors (see below), whose sum is σ = 35532378. Its totient is φ = 28259712.

The previous prime is 31696453. The next prime is 31696487. The reversal of 31696457 is 75469613.

It can be written as a sum of positive squares in 9 ways, for example, as 2493241 + 29203216 = 1579^2 + 5404^2 .

It is not a de Polignac number, because 31696457 - 2² = 31696453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31696451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 231293 + ... + 231429.

It is an arithmetic number, because the mean of its divisors is an integer number (1974021).

Almost surely, 2^31696457 is an apocalyptic number.

31696457 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

It is an amenable number.

31696457 is a deficient number, since it is larger than the sum of its proper divisors (3835921).

31696457 is a wasteful number, since it uses less digits than its factorization.

31696457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237 (or 187 counting only the distinct ones).

The product of its digits is 136080, while the sum is 41.

The square root of 31696457 is about 5629.9606570561. The cubic root of 31696457 is about 316.4731768425.

The spelling of 31696457 in words is "thirty-one million, six hundred ninety-six thousand, four hundred fifty-seven".