187328901 has 4 divisors (see below), whose sum is σ = 249771872. Its totient is φ = 124885932.

The previous prime is 187328879. The next prime is 187328903. The reversal of 187328901 is 109823781.

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 not a de Polignac number, because 187328901 - 2⁶ = 187328837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 187328901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (187328903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31221481 + ... + 31221486.

It is an arithmetic number, because the mean of its divisors is an integer number (62442968).

Almost surely, 2^187328901 is an apocalyptic number.

It is an amenable number.

187328901 is a deficient number, since it is larger than the sum of its proper divisors (62442971).

187328901 is an equidigital number, since it uses as much as digits as its factorization.

187328901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62442970.

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 187328901 is about 13686.8148595647. The cubic root of 187328901 is about 572.1829709939.

The spelling of 187328901 in words is "one hundred eighty-seven million, three hundred twenty-eight thousand, nine hundred one".