88742021 has 4 divisors (see below), whose sum is σ = 91140492. Its totient is φ = 86343552.

The previous prime is 88741997. The next prime is 88742033. The reversal of 88742021 is 12024788.

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 68392900 + 20349121 = 8270^2 + 4511^2 .

It is a cyclic number.

It is not a de Polignac number, because 88742021 - 2¹⁰ = 88740997 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 (88742041) 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, 1199180 + ... + 1199253.

It is an arithmetic number, because the mean of its divisors is an integer number (22785123).

Almost surely, 2^88742021 is an apocalyptic number.

It is an amenable number.

88742021 is a deficient number, since it is larger than the sum of its proper divisors (2398471).

88742021 is a wasteful number, since it uses less digits than its factorization.

88742021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2398470.

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 88742021 is about 9420.2983498401. The cubic root of 88742021 is about 446.0427023804.

The spelling of 88742021 in words is "eighty-eight million, seven hundred forty-two thousand, twenty-one".