189761231 has 16 divisors (see below), whose sum is σ = 212433408. Its totient is φ = 168028800.

The previous prime is 189761213. The next prime is 189761249. The reversal of 189761231 is 132167981.

It is an interprime number because it is at equal distance from previous prime (189761213) and next prime (189761249).

It is a cyclic number.

It is not a de Polignac number, because 189761231 - 2¹⁸ = 189499087 is a prime.

It is a super-2 number, since 2×189761231² = 72018649581270722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189761281) 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, 123836 + ... + 125358.

It is an arithmetic number, because the mean of its divisors is an integer number (13277088).

Almost surely, 2^189761231 is an apocalyptic number.

189761231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

189761231 is a deficient number, since it is larger than the sum of its proper divisors (22672177).

189761231 is a wasteful number, since it uses less digits than its factorization.

189761231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1822.

The product of its digits is 18144, while the sum is 38.

The square root of 189761231 is about 13775.3849673975. The cubic root of 189761231 is about 574.6487896830.

The spelling of 189761231 in words is "one hundred eighty-nine million, seven hundred sixty-one thousand, two hundred thirty-one".