3957857207 has 2 divisors, whose sum is σ = 3957857208. Its totient is φ = 3957857206.

The previous prime is 3957857191. The next prime is 3957857209. The reversal of 3957857207 is 7027587593.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3957857207 - 2⁴ = 3957857191 is a prime.

Together with 3957857209, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3957857209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1978928603 + 1978928604.

It is an arithmetic number, because the mean of its divisors is an integer number (1978928604).

Almost surely, 2^3957857207 is an apocalyptic number.

3957857207 is a deficient number, since it is larger than the sum of its proper divisors (1).

3957857207 is an equidigital number, since it uses as much as digits as its factorization.

3957857207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3704400, while the sum is 53.

The square root of 3957857207 is about 62911.5029783902. The cubic root of 3957857207 is about 1581.8065656230.

The spelling of 3957857207 in words is "three billion, nine hundred fifty-seven million, eight hundred fifty-seven thousand, two hundred seven".