99999613 has 4 divisors (see below), whose sum is σ = 114285280. Its totient is φ = 85713948.

The previous prime is 99999611. The next prime is 99999617. The reversal of 99999613 is 31699999.

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.

It is a cyclic number.

It is not a de Polignac number, because 99999613 - 2¹ = 99999611 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99999611) 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, 7142823 + ... + 7142836.

It is an arithmetic number, because the mean of its divisors is an integer number (28571320).

Almost surely, 2^99999613 is an apocalyptic number.

It is an amenable number.

99999613 is a deficient number, since it is larger than the sum of its proper divisors (14285667).

99999613 is a wasteful number, since it uses less digits than its factorization.

99999613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14285666.

The product of its digits is 1062882, while the sum is 55.

The square root of 99999613 is about 9999.9806499813. The cubic root of 99999613 is about 464.1582845955.

The spelling of 99999613 in words is "ninety-nine million, nine hundred ninety-nine thousand, six hundred thirteen".