99752391 has 10 divisors (see below), whose sum is σ = 149012952. Its totient is φ = 66501540.

The previous prime is 99752381. The next prime is 99752399. The reversal of 99752391 is 19325799.

It is a happy number.

It is not a de Polignac number, because 99752391 - 2⁹ = 99751879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99752399) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 615675 + ... + 615836.

Almost surely, 2^99752391 is an apocalyptic number.

99752391 is a deficient number, since it is larger than the sum of its proper divisors (49260561).

99752391 is a wasteful number, since it uses less digits than its factorization.

99752391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231523 (or 1231514 counting only the distinct ones).

The product of its digits is 153090, while the sum is 45.

The square root of 99752391 is about 9987.6118767201. The cubic root of 99752391 is about 463.7754670060.

The spelling of 99752391 in words is "ninety-nine million, seven hundred fifty-two thousand, three hundred ninety-one".