671093257 has 2 divisors, whose sum is σ = 671093258. Its totient is φ = 671093256.

The previous prime is 671093249. The next prime is 671093299. The reversal of 671093257 is 752390176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 665433616 + 5659641 = 25796^2 + 2379^2 .

It is a cyclic number.

It is not a de Polignac number, because 671093257 - 2³ = 671093249 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (671093557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335546628 + 335546629.

It is an arithmetic number, because the mean of its divisors is an integer number (335546629).

Almost surely, 2^671093257 is an apocalyptic number.

It is an amenable number.

671093257 is a deficient number, since it is larger than the sum of its proper divisors (1).

671093257 is an equidigital number, since it uses as much as digits as its factorization.

671093257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 79380, while the sum is 40.

The square root of 671093257 is about 25905.4677047144. The cubic root of 671093257 is about 875.5096924858.

The spelling of 671093257 in words is "six hundred seventy-one million, ninety-three thousand, two hundred fifty-seven".