31774989 has 16 divisors (see below), whose sum is σ = 44972928. Its totient is φ = 19886592.

The previous prime is 31774987. The next prime is 31774993. The reversal of 31774989 is 98947713.

It is not a de Polignac number, because 31774989 - 2¹ = 31774987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31774987) 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 15 ways as a sum of consecutive naturals, for example, 36649 + ... + 37505.

It is an arithmetic number, because the mean of its divisors is an integer number (2810808).

Almost surely, 2^31774989 is an apocalyptic number.

It is an amenable number.

31774989 is a deficient number, since it is larger than the sum of its proper divisors (13197939).

31774989 is a wasteful number, since it uses less digits than its factorization.

31774989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1604.

The product of its digits is 381024, while the sum is 48.

The square root of 31774989 is about 5636.9308138383. The cubic root of 31774989 is about 316.7343287857.

The spelling of 31774989 in words is "thirty-one million, seven hundred seventy-four thousand, nine hundred eighty-nine".