99595391 has 6 divisors (see below), whose sum is σ = 115855920. Its totient is φ = 85367436.

The previous prime is 99595387. The next prime is 99595399. The reversal of 99595391 is 19359599.

It is not a de Polignac number, because 99595391 - 2² = 99595387 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 (99595399) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1016231 + ... + 1016328.

It is an arithmetic number, because the mean of its divisors is an integer number (19309320).

Almost surely, 2^99595391 is an apocalyptic number.

99595391 is a deficient number, since it is larger than the sum of its proper divisors (16260529).

99595391 is a wasteful number, since it uses less digits than its factorization.

99595391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2032573 (or 2032566 counting only the distinct ones).

The product of its digits is 492075, while the sum is 50.

The square root of 99595391 is about 9979.7490449410. The cubic root of 99595391 is about 463.5320276225.

Adding to 99595391 its sum of digits (50), we get a triangular number (99595441 = T₁₄₁₁₃).

The spelling of 99595391 in words is "ninety-nine million, five hundred ninety-five thousand, three hundred ninety-one".