99999995 has 4 divisors (see below), whose sum is σ = 120000000. Its totient is φ = 79999992.

The previous prime is 99999989. The next prime is 100000007. The reversal of 99999995 is 59999999.

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

It is a cyclic number.

It is not a de Polignac number, because 99999995 - 2⁶ = 99999931 is a prime.

It is a nialpdrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9999995 + ... + 10000004.

It is an arithmetic number, because the mean of its divisors is an integer number (30000000).

Almost surely, 2^99999995 is an apocalyptic number.

99999995 is a deficient number, since it is larger than the sum of its proper divisors (20000005).

99999995 is a wasteful number, since it uses less digits than its factorization.

99999995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20000004.

The product of its digits is 23914845, while the sum is 68.

The square root of 99999995 is about 9999.9997500000. Note that the first 3 decimals coincide. The cubic root of 99999995 is about 464.1588756253.

The spelling of 99999995 in words is "ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-five".