99249431 has 4 divisors (see below), whose sum is σ = 99906864. Its totient is φ = 98592000.

The previous prime is 99249421. The next prime is 99249463. The reversal of 99249431 is 13494299.

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 99249431 - 2¹⁰ = 99248407 is a prime.

It is a super-2 number, since 2×99249431² = 19700899107647522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99249421) 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, 328490 + ... + 328791.

It is an arithmetic number, because the mean of its divisors is an integer number (24976716).

Almost surely, 2^99249431 is an apocalyptic number.

99249431 is a deficient number, since it is larger than the sum of its proper divisors (657433).

99249431 is a wasteful number, since it uses less digits than its factorization.

99249431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657432.

The product of its digits is 69984, while the sum is 41.

The square root of 99249431 is about 9962.4008652533. The cubic root of 99249431 is about 462.9946882258.

The spelling of 99249431 in words is "ninety-nine million, two hundred forty-nine thousand, four hundred thirty-one".