975566591 has 2 divisors, whose sum is σ = 975566592. Its totient is φ = 975566590.

The previous prime is 975566569. The next prime is 975566617. The reversal of 975566591 is 195665579.

It is a weak prime.

It is an emirp because it is prime and its reverse (195665579) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 975566591 - 2¹⁴ = 975550207 is a prime.

It is a super-2 number, since 2×975566591² = 1903460346950722562, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (975563591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 487783295 + 487783296.

It is an arithmetic number, because the mean of its divisors is an integer number (487783296).

Almost surely, 2^975566591 is an apocalyptic number.

975566591 is a deficient number, since it is larger than the sum of its proper divisors (1).

975566591 is an equidigital number, since it uses as much as digits as its factorization.

975566591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2551500, while the sum is 53.

The square root of 975566591 is about 31234.0613913721. The cubic root of 975566591 is about 991.7882826092.

The spelling of 975566591 in words is "nine hundred seventy-five million, five hundred sixty-six thousand, five hundred ninety-one".