189694831 has 2 divisors, whose sum is σ = 189694832. Its totient is φ = 189694830.

The previous prime is 189694793. The next prime is 189694871. The reversal of 189694831 is 138496981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 189694831 - 2⁹ = 189694319 is a prime.

It is a super-2 number, since 2×189694831² = 71968257816237122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189694871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94847415 + 94847416.

It is an arithmetic number, because the mean of its divisors is an integer number (94847416).

Almost surely, 2^189694831 is an apocalyptic number.

189694831 is a deficient number, since it is larger than the sum of its proper divisors (1).

189694831 is an equidigital number, since it uses as much as digits as its factorization.

189694831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 49.

The square root of 189694831 is about 13772.9746605445. The cubic root of 189694831 is about 574.5817560907.

The spelling of 189694831 in words is "one hundred eighty-nine million, six hundred ninety-four thousand, eight hundred thirty-one".