97399561 has 4 divisors (see below), whose sum is σ = 111313792. Its totient is φ = 83485332.

The previous prime is 97399537. The next prime is 97399591. The reversal of 97399561 is 16599379.

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.

It is not a de Polignac number, because 97399561 - 2¹⁵ = 97366793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97399591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6957105 + ... + 6957118.

It is an arithmetic number, because the mean of its divisors is an integer number (27828448).

Almost surely, 2^97399561 is an apocalyptic number.

It is an amenable number.

97399561 is a deficient number, since it is larger than the sum of its proper divisors (13914231).

97399561 is a wasteful number, since it uses less digits than its factorization.

97399561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13914230.

The product of its digits is 459270, while the sum is 49.

The square root of 97399561 is about 9869.1215921175. The cubic root of 97399561 is about 460.1001058125.

The spelling of 97399561 in words is "ninety-seven million, three hundred ninety-nine thousand, five hundred sixty-one".