99440531 has 8 divisors (see below), whose sum is σ = 105377184. Its totient is φ = 93513600.

The previous prime is 99440513. The next prime is 99440533. The reversal of 99440531 is 13504499.

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

It is not a de Polignac number, because 99440531 - 2²² = 95246227 is a prime.

It is a super-2 number, since 2×99440531² = 19776838411123922, 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 = 99440491 and 99440500.

It is not an unprimeable number, because it can be changed into a prime (99440533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37706 + ... + 40256.

It is an arithmetic number, because the mean of its divisors is an integer number (13172148).

Almost surely, 2^99440531 is an apocalyptic number.

99440531 is a deficient number, since it is larger than the sum of its proper divisors (5936653).

99440531 is a wasteful number, since it uses less digits than its factorization.

99440531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4861.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 99440531 is about 9971.9873144725. The cubic root of 99440531 is about 463.2916557006.

The spelling of 99440531 in words is "ninety-nine million, four hundred forty thousand, five hundred thirty-one".