671236057 has 2 divisors, whose sum is σ = 671236058. Its totient is φ = 671236056.

The previous prime is 671235991. The next prime is 671236079. The reversal of 671236057 is 750632176.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 386672896 + 284563161 = 19664^2 + 16869^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-671236057 is a prime.

It is not a weakly prime, because it can be changed into another prime (671236757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335618028 + 335618029.

It is an arithmetic number, because the mean of its divisors is an integer number (335618029).

Almost surely, 2^671236057 is an apocalyptic number.

It is an amenable number.

671236057 is a deficient number, since it is larger than the sum of its proper divisors (1).

671236057 is an equidigital number, since it uses as much as digits as its factorization.

671236057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52920, while the sum is 37.

The square root of 671236057 is about 25908.2237330157. The cubic root of 671236057 is about 875.5717871430.

The spelling of 671236057 in words is "six hundred seventy-one million, two hundred thirty-six thousand, fifty-seven".