99499561 has 16 divisors (see below), whose sum is σ = 120050560. Its totient is φ = 80559360.

The previous prime is 99499537. The next prime is 99499573. The reversal of 99499561 is 16599499.

It is not a de Polignac number, because 99499561 - 2⁵ = 99499529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99499499 and 99499508.

It is not an unprimeable number, because it can be changed into a prime (99499591) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55105 + ... + 56881.

It is an arithmetic number, because the mean of its divisors is an integer number (7503160).

Almost surely, 2^99499561 is an apocalyptic number.

It is an amenable number.

99499561 is a deficient number, since it is larger than the sum of its proper divisors (20550999).

99499561 is a wasteful number, since it uses less digits than its factorization.

99499561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2224.

The product of its digits is 787320, while the sum is 52.

The square root of 99499561 is about 9974.9466665241. The cubic root of 99499561 is about 463.3833108049.

The spelling of 99499561 in words is "ninety-nine million, four hundred ninety-nine thousand, five hundred sixty-one".