88789021 has 4 divisors (see below), whose sum is σ = 88823772. Its totient is φ = 88754272.

The previous prime is 88789013. The next prime is 88789027. The reversal of 88789021 is 12098788.

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

It can be written as a sum of positive squares in 2 ways, for example, as 53860921 + 34928100 = 7339^2 + 5910^2 .

It is a cyclic number.

It is not a de Polignac number, because 88789021 - 2³ = 88789013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88789027) 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, 13210 + ... + 18763.

It is an arithmetic number, because the mean of its divisors is an integer number (22205943).

Almost surely, 2^88789021 is an apocalyptic number.

It is an amenable number.

88789021 is a deficient number, since it is larger than the sum of its proper divisors (34751).

88789021 is a wasteful number, since it uses less digits than its factorization.

88789021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34750.

The product of its (nonzero) digits is 64512, while the sum is 43.

The square root of 88789021 is about 9422.7926327602. The cubic root of 88789021 is about 446.1214336167.

The spelling of 88789021 in words is "eighty-eight million, seven hundred eighty-nine thousand, twenty-one".