1957480817 has 2 divisors, whose sum is σ = 1957480818. Its totient is φ = 1957480816.

The previous prime is 1957480783. The next prime is 1957480823. The reversal of 1957480817 is 7180847591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1123657441 + 833823376 = 33521^2 + 28876^2 .

It is a cyclic number.

It is not a de Polignac number, because 1957480817 - 2⁸ = 1957480561 is a prime.

It is a super-2 number, since 2×1957480817² = 7663462297845974978, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1957480517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 978740408 + 978740409.

It is an arithmetic number, because the mean of its divisors is an integer number (978740409).

Almost surely, 2^1957480817 is an apocalyptic number.

It is an amenable number.

1957480817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1957480817 is an equidigital number, since it uses as much as digits as its factorization.

1957480817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 564480, while the sum is 50.

The square root of 1957480817 is about 44243.4268225236. The cubic root of 1957480817 is about 1250.9285510236.

The spelling of 1957480817 in words is "one billion, nine hundred fifty-seven million, four hundred eighty thousand, eight hundred seventeen".