31070389 has 8 divisors (see below), whose sum is σ = 35617088. Its totient is φ = 26550720.

The previous prime is 31070387. The next prime is 31070399. The reversal of 31070389 is 98307013.

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

It is not a de Polignac number, because 31070389 - 2¹ = 31070387 is a prime.

It is a super-2 number, since 2×31070389² = 1930738145222642, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31070389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31070387) 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 7 ways as a sum of consecutive naturals, for example, 4227 + ... + 8944.

It is an arithmetic number, because the mean of its divisors is an integer number (4452136).

Almost surely, 2^31070389 is an apocalyptic number.

It is an amenable number.

31070389 is a deficient number, since it is larger than the sum of its proper divisors (4546699).

31070389 is a wasteful number, since it uses less digits than its factorization.

31070389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13515.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 31070389 is about 5574.0818974967. The cubic root of 31070389 is about 314.3756474921.

The spelling of 31070389 in words is "thirty-one million, seventy thousand, three hundred eighty-nine".