31696723 has 2 divisors, whose sum is σ = 31696724. Its totient is φ = 31696722.

The previous prime is 31696711. The next prime is 31696733. The reversal of 31696723 is 32769613.

It is a strong prime.

It is an emirp because it is prime and its reverse (32769613) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31696723 - 2²¹ = 29599571 is a prime.

It is not a weakly prime, because it can be changed into another prime (31696733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15848361 + 15848362.

It is an arithmetic number, because the mean of its divisors is an integer number (15848362).

Almost surely, 2^31696723 is an apocalyptic number.

31696723 is a deficient number, since it is larger than the sum of its proper divisors (1).

31696723 is an equidigital number, since it uses as much as digits as its factorization.

31696723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 37.

The square root of 31696723 is about 5629.9842806175. The cubic root of 31696723 is about 316.4740621320.

The spelling of 31696723 in words is "thirty-one million, six hundred ninety-six thousand, seven hundred twenty-three".