88187921 has 4 divisors (see below), whose sum is σ = 88249344. Its totient is φ = 88126500.

The previous prime is 88187863. The next prime is 88187923. The reversal of 88187921 is 12978188.

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 a cyclic number.

It is not a de Polignac number, because 88187921 - 2¹⁰ = 88186897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (88187923) 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, 28505 + ... + 31446.

It is an arithmetic number, because the mean of its divisors is an integer number (22062336).

Almost surely, 2^88187921 is an apocalyptic number.

It is an amenable number.

88187921 is a deficient number, since it is larger than the sum of its proper divisors (61423).

88187921 is a wasteful number, since it uses less digits than its factorization.

88187921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61422.

The product of its digits is 64512, while the sum is 44.

The square root of 88187921 is about 9390.8424009777. The cubic root of 88187921 is about 445.1124085847.

The spelling of 88187921 in words is "eighty-eight million, one hundred eighty-seven thousand, nine hundred twenty-one".