189694957 has 2 divisors, whose sum is σ = 189694958. Its totient is φ = 189694956.

The previous prime is 189694949. The next prime is 189694963. The reversal of 189694957 is 759496981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187936681 + 1758276 = 13709^2 + 1326^2 .

It is a cyclic number.

It is not a de Polignac number, because 189694957 - 2³ = 189694949 is a prime.

It is a super-2 number, since 2×189694957² = 71968353422463698, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189694357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94847478 + 94847479.

It is an arithmetic number, because the mean of its divisors is an integer number (94847479).

Almost surely, 2^189694957 is an apocalyptic number.

It is an amenable number.

189694957 is a deficient number, since it is larger than the sum of its proper divisors (1).

189694957 is an equidigital number, since it uses as much as digits as its factorization.

189694957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4898880, while the sum is 58.

The square root of 189694957 is about 13772.9792347190. The cubic root of 189694957 is about 574.5818833078.

The spelling of 189694957 in words is "one hundred eighty-nine million, six hundred ninety-four thousand, nine hundred fifty-seven".