189655631 has 16 divisors (see below), whose sum is σ = 217486080. Its totient is φ = 163701120.

The previous prime is 189655619. The next prime is 189655633. The reversal of 189655631 is 136556981.

It is not a de Polignac number, because 189655631 - 2⁶ = 189655567 is a prime.

It is a super-2 number, since 2×189655631² = 71938516740016322, 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 (189655633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32471 + ... + 37863.

It is an arithmetic number, because the mean of its divisors is an integer number (13592880).

Almost surely, 2^189655631 is an apocalyptic number.

189655631 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

189655631 is a deficient number, since it is larger than the sum of its proper divisors (27830449).

189655631 is a wasteful number, since it uses less digits than its factorization.

189655631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5566.

The product of its digits is 194400, while the sum is 44.

The square root of 189655631 is about 13771.5515102693. The cubic root of 189655631 is about 574.5421746985.

The spelling of 189655631 in words is "one hundred eighty-nine million, six hundred fifty-five thousand, six hundred thirty-one".