31372089 has 16 divisors (see below), whose sum is σ = 50617728. Its totient is φ = 16872192.

The previous prime is 31372051. The next prime is 31372111. The reversal of 31372089 is 98027313.

It is not a de Polignac number, because 31372089 - 2⁷ = 31371961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31372009) 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, 43582 + ... + 44295.

It is an arithmetic number, because the mean of its divisors is an integer number (3163608).

Almost surely, 2^31372089 is an apocalyptic number.

It is an amenable number.

31372089 is a deficient number, since it is larger than the sum of its proper divisors (19245639).

31372089 is a wasteful number, since it uses less digits than its factorization.

31372089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87904.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 31372089 is about 5601.0792709977. The cubic root of 31372089 is about 315.3899227786.

The spelling of 31372089 in words is "thirty-one million, three hundred seventy-two thousand, eighty-nine".