188935897 has 2 divisors, whose sum is σ = 188935898. Its totient is φ = 188935896.

The previous prime is 188935843. The next prime is 188935907. The reversal of 188935897 is 798539881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179051161 + 9884736 = 13381^2 + 3144^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-188935897 is a prime.

It is not a weakly prime, because it can be changed into another prime (188935997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94467948 + 94467949.

It is an arithmetic number, because the mean of its divisors is an integer number (94467949).

Almost surely, 2^188935897 is an apocalyptic number.

It is an amenable number.

188935897 is a deficient number, since it is larger than the sum of its proper divisors (1).

188935897 is an equidigital number, since it uses as much as digits as its factorization.

188935897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4354560, while the sum is 58.

The square root of 188935897 is about 13745.3954835792. The cubic root of 188935897 is about 573.8144667398.

The spelling of 188935897 in words is "one hundred eighty-eight million, nine hundred thirty-five thousand, eight hundred ninety-seven".