970718557 has 2 divisors, whose sum is σ = 970718558. Its totient is φ = 970718556.

The previous prime is 970718549. The next prime is 970718561. The reversal of 970718557 is 755817079.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 800833401 + 169885156 = 28299^2 + 13034^2 .

It is an emirp because it is prime and its reverse (755817079) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 970718557 - 2³ = 970718549 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 970718557.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (970712557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485359278 + 485359279.

It is an arithmetic number, because the mean of its divisors is an integer number (485359279).

Almost surely, 2^970718557 is an apocalyptic number.

It is an amenable number.

970718557 is a deficient number, since it is larger than the sum of its proper divisors (1).

970718557 is an equidigital number, since it uses as much as digits as its factorization.

970718557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 617400, while the sum is 49.

The square root of 970718557 is about 31156.3566066381. The cubic root of 970718557 is about 990.1426713405.

The spelling of 970718557 in words is "nine hundred seventy million, seven hundred eighteen thousand, five hundred fifty-seven".