99190431 has 24 divisors (see below), whose sum is σ = 151482240. Its totient is φ = 62370000.

The previous prime is 99190423. The next prime is 99190433. The reversal of 99190431 is 13409199.

It is not a de Polignac number, because 99190431 - 2³ = 99190423 is a prime.

It is a super-2 number, since 2×99190431² = 19677483203931522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99190433) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41766 + ... + 44076.

It is an arithmetic number, because the mean of its divisors is an integer number (6311760).

Almost surely, 2^99190431 is an apocalyptic number.

99190431 is a deficient number, since it is larger than the sum of its proper divisors (52291809).

99190431 is a wasteful number, since it uses less digits than its factorization.

99190431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2587 (or 2584 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 99190431 is about 9959.4392914461. The cubic root of 99190431 is about 462.9029258145.

The spelling of 99190431 in words is "ninety-nine million, one hundred ninety thousand, four hundred thirty-one".