97619591 has 2 divisors, whose sum is σ = 97619592. Its totient is φ = 97619590.

The previous prime is 97619573. The next prime is 97619609. The reversal of 97619591 is 19591679.

It is a balanced prime because it is at equal distance from previous prime (97619573) and next prime (97619609).

It is a cyclic number.

It is not a de Polignac number, because 97619591 - 2¹⁰ = 97618567 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97619791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48809795 + 48809796.

It is an arithmetic number, because the mean of its divisors is an integer number (48809796).

Almost surely, 2^97619591 is an apocalyptic number.

97619591 is a deficient number, since it is larger than the sum of its proper divisors (1).

97619591 is an equidigital number, since it uses as much as digits as its factorization.

97619591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 153090, while the sum is 47.

The square root of 97619591 is about 9880.2626989367. The cubic root of 97619591 is about 460.4463075430.

The spelling of 97619591 in words is "ninety-seven million, six hundred nineteen thousand, five hundred ninety-one".