99440431 has 8 divisors (see below), whose sum is σ = 105466464. Its totient is φ = 93556320.

The previous prime is 99440401. The next prime is 99440437. The reversal of 99440431 is 13404499.

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

It is a cyclic number.

It is not a de Polignac number, because 99440431 - 2⁷ = 99440303 is a prime.

It is a super-2 number, since 2×99440431² = 19776798634931522, 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 (99440437) 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, 34036 + ... + 36841.

It is an arithmetic number, because the mean of its divisors is an integer number (13183308).

Almost surely, 2^99440431 is an apocalyptic number.

99440431 is a deficient number, since it is larger than the sum of its proper divisors (6026033).

99440431 is a wasteful number, since it uses less digits than its factorization.

99440431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70961.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 99440431 is about 9971.9823004255. The cubic root of 99440431 is about 463.2915004011.

The spelling of 99440431 in words is "ninety-nine million, four hundred forty thousand, four hundred thirty-one".