31714987 has 2 divisors, whose sum is σ = 31714988. Its totient is φ = 31714986.

The previous prime is 31714939. The next prime is 31714993. The reversal of 31714987 is 78941713.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31714987 is a prime.

It is not a weakly prime, because it can be changed into another prime (31714997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15857493 + 15857494.

It is an arithmetic number, because the mean of its divisors is an integer number (15857494).

Almost surely, 2^31714987 is an apocalyptic number.

31714987 is a deficient number, since it is larger than the sum of its proper divisors (1).

31714987 is an equidigital number, since it uses as much as digits as its factorization.

31714987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 40.

The square root of 31714987 is about 5631.6060764226. The cubic root of 31714987 is about 316.5348357378.

The spelling of 31714987 in words is "thirty-one million, seven hundred fourteen thousand, nine hundred eighty-seven".