88693921 has 4 divisors (see below), whose sum is σ = 91091092. Its totient is φ = 86296752.

The previous prime is 88693909. The next prime is 88693949. The reversal of 88693921 is 12939688.

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 38440000 + 50253921 = 6200^2 + 7089^2 .

It is a cyclic number.

It is not a de Polignac number, because 88693921 - 2¹⁷ = 88562849 is a prime.

It is a super-2 number, since 2×88693921² = 15733223244708482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (88693951) 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, 1198530 + ... + 1198603.

It is an arithmetic number, because the mean of its divisors is an integer number (22772773).

Almost surely, 2^88693921 is an apocalyptic number.

It is an amenable number.

88693921 is a deficient number, since it is larger than the sum of its proper divisors (2397171).

88693921 is a wasteful number, since it uses less digits than its factorization.

88693921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2397170.

The product of its digits is 186624, while the sum is 46.

The square root of 88693921 is about 9417.7450061042. The cubic root of 88693921 is about 445.9620997106.

The spelling of 88693921 in words is "eighty-eight million, six hundred ninety-three thousand, nine hundred twenty-one".