97609639 has 4 divisors (see below), whose sum is σ = 97629400. Its totient is φ = 97589880.

The previous prime is 97609619. The next prime is 97609649. The reversal of 97609639 is 93690679.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 97609639 - 2²³ = 89221031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 97609592 and 97609601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97609619) 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, 4837 + ... + 14785.

It is an arithmetic number, because the mean of its divisors is an integer number (24407350).

Almost surely, 2^97609639 is an apocalyptic number.

97609639 is a deficient number, since it is larger than the sum of its proper divisors (19761).

97609639 is an equidigital number, since it uses as much as digits as its factorization.

97609639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19760.

The product of its (nonzero) digits is 551124, while the sum is 49.

The square root of 97609639 is about 9879.7590557665. The cubic root of 97609639 is about 460.4306600098.

The spelling of 97609639 in words is "ninety-seven million, six hundred nine thousand, six hundred thirty-nine".