189310031 has 16 divisors (see below), whose sum is σ = 197406720. Its totient is φ = 181431360.

The previous prime is 189310021. The next prime is 189310061. The reversal of 189310031 is 130013981.

It is a cyclic number.

It is not a de Polignac number, because 189310031 - 2¹⁰ = 189309007 is a prime.

It is a super-2 number, since 2×189310031² = 71676575674441922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189310021) 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, 698426 + ... + 698696.

It is an arithmetic number, because the mean of its divisors is an integer number (12337920).

Almost surely, 2^189310031 is an apocalyptic number.

189310031 is a deficient number, since it is larger than the sum of its proper divisors (8096689).

189310031 is a wasteful number, since it uses less digits than its factorization.

189310031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 189310031 is about 13758.9981830074. The cubic root of 189310031 is about 574.1929759841.

The spelling of 189310031 in words is "one hundred eighty-nine million, three hundred ten thousand, thirty-one".