97599989 has 2 divisors, whose sum is σ = 97599990. Its totient is φ = 97599988.

The previous prime is 97599961. The next prime is 97600003. The reversal of 97599989 is 98999579.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80102500 + 17497489 = 8950^2 + 4183^2 .

It is a cyclic number.

It is not a de Polignac number, because 97599989 - 2²⁴ = 80822773 is a 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 (97599919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48799994 + 48799995.

It is an arithmetic number, because the mean of its divisors is an integer number (48799995).

Almost surely, 2^97599989 is an apocalyptic number.

It is an amenable number.

97599989 is a deficient number, since it is larger than the sum of its proper divisors (1).

97599989 is an equidigital number, since it uses as much as digits as its factorization.

97599989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16533720, while the sum is 65.

The square root of 97599989 is about 9879.2706714615. The cubic root of 97599989 is about 460.4154862956.

The spelling of 97599989 in words is "ninety-seven million, five hundred ninety-nine thousand, nine hundred eighty-nine".