31996377 has 20 divisors (see below), whose sum is σ = 54626176. Its totient is φ = 18283320.

The previous prime is 31996351. The next prime is 31996403. The reversal of 31996377 is 77369913.

31996377 is a `hidden beast` number, since 3 + 1 + 9 + 9 + 637 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (31996351) and next prime (31996403).

It is not a de Polignac number, because 31996377 - 2⁸ = 31996121 is a prime.

It is a super-2 number, since 2×31996377² = 2047536282252258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31996337) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 27649 + ... + 28782.

Almost surely, 2^31996377 is an apocalyptic number.

It is an amenable number.

31996377 is a deficient number, since it is larger than the sum of its proper divisors (22629799).

31996377 is an equidigital number, since it uses as much as digits as its factorization.

31996377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56450 (or 56441 counting only the distinct ones).

The product of its digits is 214326, while the sum is 45.

The square root of 31996377 is about 5656.5340094443. The cubic root of 31996377 is about 317.4682283706.

The spelling of 31996377 in words is "thirty-one million, nine hundred ninety-six thousand, three hundred seventy-seven".