97818407 has 4 divisors (see below), whose sum is σ = 97861296. Its totient is φ = 97775520.

The previous prime is 97818397. The next prime is 97818431. The reversal of 97818407 is 70481879.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 97818407 - 2⁸ = 97818151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97818107) 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, 17819 + ... + 22652.

It is an arithmetic number, because the mean of its divisors is an integer number (24465324).

Almost surely, 2^97818407 is an apocalyptic number.

97818407 is a deficient number, since it is larger than the sum of its proper divisors (42889).

97818407 is a wasteful number, since it uses less digits than its factorization.

97818407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42888.

The product of its (nonzero) digits is 112896, while the sum is 44.

The square root of 97818407 is about 9890.3188522919. The cubic root of 97818407 is about 460.7586834193.

The spelling of 97818407 in words is "ninety-seven million, eight hundred eighteen thousand, four hundred seven".