189896957 has 2 divisors, whose sum is σ = 189896958. Its totient is φ = 189896956.

The previous prime is 189896939. The next prime is 189896969. The reversal of 189896957 is 759698981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170589721 + 19307236 = 13061^2 + 4394^2 .

It is an emirp because it is prime and its reverse (759698981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189896957 - 2⁶ = 189896893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 189896957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189896977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94948478 + 94948479.

It is an arithmetic number, because the mean of its divisors is an integer number (94948479).

Almost surely, 2^189896957 is an apocalyptic number.

It is an amenable number.

189896957 is a deficient number, since it is larger than the sum of its proper divisors (1).

189896957 is an equidigital number, since it uses as much as digits as its factorization.

189896957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9797760, while the sum is 62.

The square root of 189896957 is about 13780.3104827141. The cubic root of 189896957 is about 574.7857621535.

The spelling of 189896957 in words is "one hundred eighty-nine million, eight hundred ninety-six thousand, nine hundred fifty-seven".