189500491 has 8 divisors (see below), whose sum is σ = 194335200. Its totient is φ = 184726080.

The previous prime is 189500453. The next prime is 189500501. The reversal of 189500491 is 194005981.

189500491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189500491 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 189500491.

It is not an unprimeable number, because it can be changed into a prime (189500431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8676 + ... + 21313.

It is an arithmetic number, because the mean of its divisors is an integer number (24291900).

Almost surely, 2^189500491 is an apocalyptic number.

189500491 is a deficient number, since it is larger than the sum of its proper divisors (4834709).

189500491 is an equidigital number, since it uses as much as digits as its factorization.

189500491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30149.

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 189500491 is about 13765.9177318477. The cubic root of 189500491 is about 574.3854717525.

The spelling of 189500491 in words is "one hundred eighty-nine million, five hundred thousand, four hundred ninety-one".