97231556009 has 4 divisors (see below), whose sum is σ = 111121778304. Its totient is φ = 83341333716.

The previous prime is 97231555999. The next prime is 97231556063. The reversal of 97231556009 is 90065513279.

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: 90065513279 = 7 ⋅12866501897.

It is a cyclic number.

It is not a de Polignac number, because 97231556009 - 2²⁰ = 97230507433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97231556809) 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, 6945111137 + ... + 6945111150.

It is an arithmetic number, because the mean of its divisors is an integer number (27780444576).

Almost surely, 2^97231556009 is an apocalyptic number.

It is an amenable number.

97231556009 is a deficient number, since it is larger than the sum of its proper divisors (13890222295).

97231556009 is a wasteful number, since it uses less digits than its factorization.

97231556009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13890222294.

The product of its (nonzero) digits is 510300, while the sum is 47.

The spelling of 97231556009 in words is "ninety-seven billion, two hundred thirty-one million, five hundred fifty-six thousand, nine".