31980963 has 16 divisors (see below), whose sum is σ = 48888320. Its totient is φ = 18216576.

The previous prime is 31980959. The next prime is 31980967. The reversal of 31980963 is 36908913.

It is an interprime number because it is at equal distance from previous prime (31980959) and next prime (31980967).

It is not a de Polignac number, because 31980963 - 2² = 31980959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31980967) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4818 + ... + 9336.

It is an arithmetic number, because the mean of its divisors is an integer number (3055520).

Almost surely, 2^31980963 is an apocalyptic number.

31980963 is a deficient number, since it is larger than the sum of its proper divisors (16907357).

31980963 is a wasteful number, since it uses less digits than its factorization.

31980963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4866.

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 31980963 is about 5655.1713501891. The cubic root of 31980963 is about 317.4172409179.

The spelling of 31980963 in words is "thirty-one million, nine hundred eighty thousand, nine hundred sixty-three".