99999999539 has 8 divisors (see below), whose sum is σ = 111751662960. Its totient is φ = 88691795200.

The previous prime is 99999999529. The next prime is 99999999551. The reversal of 99999999539 is 93599999999.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99999999539 - 2²⁸ = 99731564083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99999999529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110864294 + ... + 110865195.

It is an arithmetic number, because the mean of its divisors is an integer number (13968957870).

Almost surely, 2^99999999539 is an apocalyptic number.

99999999539 is a deficient number, since it is larger than the sum of its proper divisors (11751663421).

99999999539 is a wasteful number, since it uses less digits than its factorization.

99999999539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221729541.

The product of its digits is 5811307335, while the sum is 89.

The spelling of 99999999539 in words is "ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, five hundred thirty-nine".