189321508 has 6 divisors (see below), whose sum is σ = 331312646. Its totient is φ = 94660752.

The previous prime is 189321497. The next prime is 189321511. The reversal of 189321508 is 805123981.

It can be written as a sum of positive squares in only one way, i.e., 98843364 + 90478144 = 9942^2 + 9512^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23665185 + ... + 23665192.

Almost surely, 2^189321508 is an apocalyptic number.

It is an amenable number.

189321508 is a deficient number, since it is larger than the sum of its proper divisors (141991138).

189321508 is a wasteful number, since it uses less digits than its factorization.

189321508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47330381 (or 47330379 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 37.

The square root of 189321508 is about 13759.4152492030. The cubic root of 189321508 is about 574.2045793129.

The spelling of 189321508 in words is "one hundred eighty-nine million, three hundred twenty-one thousand, five hundred eight".