31696487 has 2 divisors, whose sum is σ = 31696488. Its totient is φ = 31696486.

The previous prime is 31696453. The next prime is 31696523. The reversal of 31696487 is 78469613.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31696487 - 2¹² = 31692391 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31690487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15848243 + 15848244.

It is an arithmetic number, because the mean of its divisors is an integer number (15848244).

Almost surely, 2^31696487 is an apocalyptic number.

31696487 is a deficient number, since it is larger than the sum of its proper divisors (1).

31696487 is an equidigital number, since it uses as much as digits as its factorization.

31696487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 44.

The square root of 31696487 is about 5629.9633213725. The cubic root of 31696487 is about 316.4732766874.

The spelling of 31696487 in words is "thirty-one million, six hundred ninety-six thousand, four hundred eighty-seven".