99810431 has 8 divisors (see below), whose sum is σ = 118002720. Its totient is φ = 82601568.

The previous prime is 99810427. The next prime is 99810433. The reversal of 99810431 is 13401899.

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

It is not a de Polignac number, because 99810431 - 2² = 99810427 is a prime.

It is a super-2 number, since 2×99810431² = 19924244272811522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99810391 and 99810400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99810433) 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, 245636 + ... + 246041.

It is an arithmetic number, because the mean of its divisors is an integer number (14750340).

Almost surely, 2^99810431 is an apocalyptic number.

99810431 is a deficient number, since it is larger than the sum of its proper divisors (18192289).

99810431 is a wasteful number, since it uses less digits than its factorization.

99810431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491713.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 99810431 is about 9990.5170536865. The cubic root of 99810431 is about 463.8653973791.

The spelling of 99810431 in words is "ninety-nine million, eight hundred ten thousand, four hundred thirty-one".