99511613 has 4 divisors (see below), whose sum is σ = 99535260. Its totient is φ = 99487968.

The previous prime is 99511597. The next prime is 99511631. The reversal of 99511613 is 31611599.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31611599 = 31 ⋅1019729.

It can be written as a sum of positive squares in 2 ways, for example, as 67453369 + 32058244 = 8213^2 + 5662^2 .

It is a cyclic number.

It is not a de Polignac number, because 99511613 - 2⁴ = 99511597 is a prime.

It is a super-2 number, since 2×99511613² = 19805122243723538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99511213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3608 + ... + 14561.

It is an arithmetic number, because the mean of its divisors is an integer number (24883815).

Almost surely, 2^99511613 is an apocalyptic number.

It is an amenable number.

99511613 is a deficient number, since it is larger than the sum of its proper divisors (23647).

99511613 is a wasteful number, since it uses less digits than its factorization.

99511613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23646.

The product of its digits is 7290, while the sum is 35.

The square root of 99511613 is about 9975.5507617374. The cubic root of 99511613 is about 463.4020193303.

The spelling of 99511613 in words is "ninety-nine million, five hundred eleven thousand, six hundred thirteen".