99520513 has 4 divisors (see below), whose sum is σ = 99633600. Its totient is φ = 99407428.

The previous prime is 99520511. The next prime is 99520523. The reversal of 99520513 is 31502599.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31502599 = 661 ⋅47659.

It is a cyclic number.

It is not a de Polignac number, because 99520513 - 2¹ = 99520511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99520511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55213 + ... + 56986.

It is an arithmetic number, because the mean of its divisors is an integer number (24908400).

Almost surely, 2^99520513 is an apocalyptic number.

It is an amenable number.

99520513 is a deficient number, since it is larger than the sum of its proper divisors (113087).

99520513 is a wasteful number, since it uses less digits than its factorization.

99520513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113086.

The product of its (nonzero) digits is 12150, while the sum is 34.

The square root of 99520513 is about 9975.9968424213. The cubic root of 99520513 is about 463.4158339827.

The spelling of 99520513 in words is "ninety-nine million, five hundred twenty thousand, five hundred thirteen".