31272893 has 12 divisors (see below), whose sum is σ = 33763968. Its totient is φ = 28933080.

The previous prime is 31272889. The next prime is 31272937. The reversal of 31272893 is 39827213.

It is not a de Polignac number, because 31272893 - 2² = 31272889 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31272833) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15446 + ... + 17352.

It is an arithmetic number, because the mean of its divisors is an integer number (2813664).

Almost surely, 2^31272893 is an apocalyptic number.

It is an amenable number.

31272893 is a deficient number, since it is larger than the sum of its proper divisors (2491075).

31272893 is a wasteful number, since it uses less digits than its factorization.

31272893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1984 (or 1961 counting only the distinct ones).

The product of its digits is 18144, while the sum is 35.

The square root of 31272893 is about 5592.2171810472. The cubic root of 31272893 is about 315.0571593594.

The spelling of 31272893 in words is "thirty-one million, two hundred seventy-two thousand, eight hundred ninety-three".