97580891 has 2 divisors, whose sum is σ = 97580892. Its totient is φ = 97580890.

The previous prime is 97580887. The next prime is 97580921. The reversal of 97580891 is 19808579.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97580891 - 2² = 97580887 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (97580801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48790445 + 48790446.

It is an arithmetic number, because the mean of its divisors is an integer number (48790446).

Almost surely, 2^97580891 is an apocalyptic number.

97580891 is a deficient number, since it is larger than the sum of its proper divisors (1).

97580891 is an equidigital number, since it uses as much as digits as its factorization.

97580891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 47.

The square root of 97580891 is about 9878.3040548467. The cubic root of 97580891 is about 460.3854535444.

The spelling of 97580891 in words is "ninety-seven million, five hundred eighty thousand, eight hundred ninety-one".