1957214957 has 2 divisors, whose sum is σ = 1957214958. Its totient is φ = 1957214956.

The previous prime is 1957214933. The next prime is 1957214971. The reversal of 1957214957 is 7594127591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1653967561 + 303247396 = 40669^2 + 17414^2 .

It is an emirp because it is prime and its reverse (7594127591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1957214957 - 2⁶ = 1957214893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1957214557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 978607478 + 978607479.

It is an arithmetic number, because the mean of its divisors is an integer number (978607479).

Almost surely, 2^1957214957 is an apocalyptic number.

It is an amenable number.

1957214957 is a deficient number, since it is larger than the sum of its proper divisors (1).

1957214957 is an equidigital number, since it uses as much as digits as its factorization.

1957214957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 793800, while the sum is 50.

The square root of 1957214957 is about 44240.4222063940. The cubic root of 1957214957 is about 1250.8719158288.

The spelling of 1957214957 in words is "one billion, nine hundred fifty-seven million, two hundred fourteen thousand, nine hundred fifty-seven".