97599809 has 4 divisors (see below), whose sum is σ = 99869616. Its totient is φ = 95330004.

The previous prime is 97599781. The next prime is 97599841. The reversal of 97599809 is 90899579.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90899579 = 3229 ⋅28151.

It is a cyclic number.

It is not a de Polignac number, because 97599809 - 2¹² = 97595713 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (97599869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1134839 + ... + 1134924.

It is an arithmetic number, because the mean of its divisors is an integer number (24967404).

Almost surely, 2^97599809 is an apocalyptic number.

It is an amenable number.

97599809 is a deficient number, since it is larger than the sum of its proper divisors (2269807).

97599809 is a wasteful number, since it uses less digits than its factorization.

97599809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2269806.

The product of its (nonzero) digits is 1837080, while the sum is 56.

The square root of 97599809 is about 9879.2615614731. The cubic root of 97599809 is about 460.4152032531.

The spelling of 97599809 in words is "ninety-seven million, five hundred ninety-nine thousand, eight hundred nine".