97809567 has 8 divisors (see below), whose sum is σ = 130682496. Its totient is φ = 65071512.

The previous prime is 97809497. The next prime is 97809571. The reversal of 97809567 is 76590879.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 97809567 - 2⁸ = 97809311 is a prime.

It is a super-2 number, since 2×97809567² = 19133422793454978, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97809577) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32013 + ... + 34934.

It is an arithmetic number, because the mean of its divisors is an integer number (16335312).

Almost surely, 2^97809567 is an apocalyptic number.

97809567 is a deficient number, since it is larger than the sum of its proper divisors (32872929).

97809567 is a wasteful number, since it uses less digits than its factorization.

97809567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67437.

The product of its (nonzero) digits is 952560, while the sum is 51.

The square root of 97809567 is about 9889.8719405258. The cubic root of 97809567 is about 460.7448031774.

The spelling of 97809567 in words is "ninety-seven million, eight hundred nine thousand, five hundred sixty-seven".