188464321 has 4 divisors (see below), whose sum is σ = 188545792. Its totient is φ = 188382852.

The previous prime is 188464291. The next prime is 188464373. The reversal of 188464321 is 123464881.

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 188464321 - 2²⁵ = 154909889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (188464121) 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, 37161 + ... + 41926.

It is an arithmetic number, because the mean of its divisors is an integer number (47136448).

Almost surely, 2^188464321 is an apocalyptic number.

It is an amenable number.

188464321 is a deficient number, since it is larger than the sum of its proper divisors (81471).

188464321 is an equidigital number, since it uses as much as digits as its factorization.

188464321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81470.

The product of its digits is 36864, while the sum is 37.

The square root of 188464321 is about 13728.2308037125. The cubic root of 188464321 is about 573.3366634549.

The spelling of 188464321 in words is "one hundred eighty-eight million, four hundred sixty-four thousand, three hundred twenty-one".