88919999 has 4 divisors (see below), whose sum is σ = 101622864. Its totient is φ = 76217136.

The previous prime is 88919983. The next prime is 88920031. The reversal of 88919999 is 99991988.

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 88919999 - 2⁴ = 88919983 is a prime.

88919999 is a modest number, since divided by 9999 gives 8891 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88919959) 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, 6351422 + ... + 6351435.

It is an arithmetic number, because the mean of its divisors is an integer number (25405716).

Almost surely, 2^88919999 is an apocalyptic number.

88919999 is a deficient number, since it is larger than the sum of its proper divisors (12702865).

88919999 is a wasteful number, since it uses less digits than its factorization.

88919999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12702864.

The product of its digits is 3779136, while the sum is 62.

The square root of 88919999 is about 9429.7401342773. The cubic root of 88919999 is about 446.3406926488.

The spelling of 88919999 in words is "eighty-eight million, nine hundred nineteen thousand, nine hundred ninety-nine".