99445945 has 4 divisors (see below), whose sum is σ = 119335140. Its totient is φ = 79556752.

The previous prime is 99445939. The next prime is 99445979. The reversal of 99445945 is 54954499.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54954499 = 113 ⋅486323.

It can be written as a sum of positive squares in 2 ways, for example, as 44448889 + 54997056 = 6667^2 + 7416^2 .

It is a cyclic number.

It is not a de Polignac number, because 99445945 - 2²¹ = 97348793 is a prime.

It is an unprimeable number.

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, 9944590 + ... + 9944599.

It is an arithmetic number, because the mean of its divisors is an integer number (29833785).

Almost surely, 2^99445945 is an apocalyptic number.

It is an amenable number.

99445945 is a deficient number, since it is larger than the sum of its proper divisors (19889195).

99445945 is a wasteful number, since it uses less digits than its factorization.

99445945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19889194.

The product of its digits is 1166400, while the sum is 49.

The square root of 99445945 is about 9972.2587712113. The cubic root of 99445945 is about 463.3000634577.

The spelling of 99445945 in words is "ninety-nine million, four hundred forty-five thousand, nine hundred forty-five".