99999501 has 16 divisors (see below), whose sum is σ = 152830464. Its totient is φ = 56973744.

The previous prime is 99999481. The next prime is 99999509. The reversal of 99999501 is 10599999.

It is not a de Polignac number, because 99999501 - 2⁶ = 99999437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99999509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 426 + ... + 14148.

It is an arithmetic number, because the mean of its divisors is an integer number (9551904).

Almost surely, 2^99999501 is an apocalyptic number.

It is an amenable number.

99999501 is a deficient number, since it is larger than the sum of its proper divisors (52830963).

99999501 is a wasteful number, since it uses less digits than its factorization.

99999501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14080.

The product of its (nonzero) digits is 295245, while the sum is 51.

The square root of 99999501 is about 9999.9750499689. The cubic root of 99999501 is about 464.1581113091.

The spelling of 99999501 in words is "ninety-nine million, nine hundred ninety-nine thousand, five hundred one".