31660963 has 2 divisors, whose sum is σ = 31660964. Its totient is φ = 31660962.

The previous prime is 31660961. The next prime is 31660991. The reversal of 31660963 is 36906613.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31660963 - 2¹ = 31660961 is a prime.

Together with 31660961, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (31660961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15830481 + 15830482.

It is an arithmetic number, because the mean of its divisors is an integer number (15830482).

Almost surely, 2^31660963 is an apocalyptic number.

31660963 is a deficient number, since it is larger than the sum of its proper divisors (1).

31660963 is an equidigital number, since it uses as much as digits as its factorization.

31660963 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 34.

The square root of 31660963 is about 5626.8075318070. The cubic root of 31660963 is about 316.3550028096.

It can be divided in two parts, 31660 and 963, that added together give a palindrome (32623).

The spelling of 31660963 in words is "thirty-one million, six hundred sixty thousand, nine hundred sixty-three".