99509613 has 32 divisors (see below), whose sum is σ = 157710336. Its totient is φ = 54623808.

The previous prime is 99509603. The next prime is 99509617. The reversal of 99509613 is 31690599.

It is not a de Polignac number, because 99509613 - 2⁵ = 99509581 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99509617) 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 31 ways as a sum of consecutive naturals, for example, 63720 + ... + 65262.

It is an arithmetic number, because the mean of its divisors is an integer number (4928448).

Almost surely, 2^99509613 is an apocalyptic number.

It is an amenable number.

99509613 is a deficient number, since it is larger than the sum of its proper divisors (58200723).

99509613 is a wasteful number, since it uses less digits than its factorization.

99509613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1673.

The product of its (nonzero) digits is 65610, while the sum is 42.

The square root of 99509613 is about 9975.4505161421. The cubic root of 99509613 is about 463.3989148007.

The spelling of 99509613 in words is "ninety-nine million, five hundred nine thousand, six hundred thirteen".