31399027 has 8 divisors (see below), whose sum is σ = 34303680. Its totient is φ = 28502760.

The previous prime is 31399007. The next prime is 31399031. The reversal of 31399027 is 72099313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31399027 - 2¹⁵ = 31366259 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31398983 and 31399001.

It is not an unprimeable number, because it can be changed into a prime (31399007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7788 + ... + 11110.

It is an arithmetic number, because the mean of its divisors is an integer number (4287960).

Almost surely, 2^31399027 is an apocalyptic number.

31399027 is a deficient number, since it is larger than the sum of its proper divisors (2904653).

31399027 is a wasteful number, since it uses less digits than its factorization.

31399027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4193.

The product of its (nonzero) digits is 10206, while the sum is 34.

The square root of 31399027 is about 5603.4834701282. The cubic root of 31399027 is about 315.4801679982.

The spelling of 31399027 in words is "thirty-one million, three hundred ninety-nine thousand, twenty-seven".