88664421 has 4 divisors (see below), whose sum is σ = 118219232. Its totient is φ = 59109612.

The previous prime is 88664417. The next prime is 88664441. The reversal of 88664421 is 12446688.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 88664421 - 2² = 88664417 is a prime.

It is a super-2 number, since 2×88664421² = 15722759102530482, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 88664421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88664441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14777401 + ... + 14777406.

It is an arithmetic number, because the mean of its divisors is an integer number (29554808).

Almost surely, 2^88664421 is an apocalyptic number.

It is an amenable number.

88664421 is a deficient number, since it is larger than the sum of its proper divisors (29554811).

88664421 is a wasteful number, since it uses less digits than its factorization.

88664421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29554810.

The product of its digits is 73728, while the sum is 39.

The square root of 88664421 is about 9416.1786835213. The cubic root of 88664421 is about 445.9126512229.

The spelling of 88664421 in words is "eighty-eight million, six hundred sixty-four thousand, four hundred twenty-one".