99444531 has 4 divisors (see below), whose sum is σ = 132592712. Its totient is φ = 66296352.

The previous prime is 99444491. The next prime is 99444539. The reversal of 99444531 is 13544499.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13544499 = 3 ⋅4514833.

It is not a de Polignac number, because 99444531 - 2⁶ = 99444467 is a prime.

It is a super-2 number, since 2×99444531² = 19778429491619922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99444531.

It is not an unprimeable number, because it can be changed into a prime (99444539) 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 3 ways as a sum of consecutive naturals, for example, 16574086 + ... + 16574091.

It is an arithmetic number, because the mean of its divisors is an integer number (33148178).

Almost surely, 2^99444531 is an apocalyptic number.

99444531 is a deficient number, since it is larger than the sum of its proper divisors (33148181).

99444531 is a wasteful number, since it uses less digits than its factorization.

99444531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33148180.

The product of its digits is 77760, while the sum is 39.

The square root of 99444531 is about 9972.1878742832. The cubic root of 99444531 is about 463.2978675934.

The spelling of 99444531 in words is "ninety-nine million, four hundred forty-four thousand, five hundred thirty-one".