99391440597 has 8 divisors (see below), whose sum is σ = 133533539040. Its totient is φ = 65755151280.

The previous prime is 99391440583. The next prime is 99391440677. The reversal of 99391440597 is 79504419399.

It is a happy number.

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

It is not a de Polignac number, because 99391440597 - 2¹⁴ = 99391424213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99391440597.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99391440527) 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, 126451822 + ... + 126452607.

It is an arithmetic number, because the mean of its divisors is an integer number (16691692380).

Almost surely, 2^99391440597 is an apocalyptic number.

It is an amenable number.

99391440597 is a deficient number, since it is larger than the sum of its proper divisors (34142098443).

99391440597 is a wasteful number, since it uses less digits than its factorization.

99391440597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252904563.

The product of its (nonzero) digits is 11022480, while the sum is 60.

The spelling of 99391440597 in words is "ninety-nine billion, three hundred ninety-one million, four hundred forty thousand, five hundred ninety-seven".