99999013 has 4 divisors (see below), whose sum is σ = 100039788. Its totient is φ = 99958240.

The previous prime is 99998999. The next prime is 99999043. The reversal of 99999013 is 31099999.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 77739489 + 22259524 = 8817^2 + 4718^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99999013 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 (99999043) 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 3 ways as a sum of consecutive naturals, for example, 16456 + ... + 21697.

It is an arithmetic number, because the mean of its divisors is an integer number (25009947).

Almost surely, 2^99999013 is an apocalyptic number.

It is an amenable number.

99999013 is a deficient number, since it is larger than the sum of its proper divisors (40775).

99999013 is a wasteful number, since it uses less digits than its factorization.

99999013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40774.

The product of its (nonzero) digits is 177147, while the sum is 49.

The square root of 99999013 is about 9999.9506498782. The cubic root of 99999013 is about 464.1573562735.

The spelling of 99999013 in words is "ninety-nine million, nine hundred ninety-nine thousand, thirteen".