189149431 has 2 divisors, whose sum is σ = 189149432. Its totient is φ = 189149430.

The previous prime is 189149417. The next prime is 189149453. The reversal of 189149431 is 134941981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 189149431 - 2⁵ = 189149399 is a prime.

It is a super-2 number, since 2×189149431² = 71555014495247522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189149491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94574715 + 94574716.

It is an arithmetic number, because the mean of its divisors is an integer number (94574716).

Almost surely, 2^189149431 is an apocalyptic number.

189149431 is a deficient number, since it is larger than the sum of its proper divisors (1).

189149431 is an equidigital number, since it uses as much as digits as its factorization.

189149431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 40.

The square root of 189149431 is about 13753.1607639844. The cubic root of 189149431 is about 574.0305590209.

The spelling of 189149431 in words is "one hundred eighty-nine million, one hundred forty-nine thousand, four hundred thirty-one".