31118977 has 4 divisors (see below), whose sum is σ = 32472000. Its totient is φ = 29765956.

The previous prime is 31118953. The next prime is 31118999. The reversal of 31118977 is 77981113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-31118977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31118077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 676477 + ... + 676522.

It is an arithmetic number, because the mean of its divisors is an integer number (8118000).

Almost surely, 2^31118977 is an apocalyptic number.

It is an amenable number.

31118977 is a deficient number, since it is larger than the sum of its proper divisors (1353023).

31118977 is a wasteful number, since it uses less digits than its factorization.

31118977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1353022.

The product of its digits is 10584, while the sum is 37.

The square root of 31118977 is about 5578.4385808217. The cubic root of 31118977 is about 314.5394361137.

The spelling of 31118977 in words is "thirty-one million, one hundred eighteen thousand, nine hundred seventy-seven".