189502491 has 4 divisors (see below), whose sum is σ = 252669992. Its totient is φ = 126334992.

The previous prime is 189502487. The next prime is 189502499. The reversal of 189502491 is 194205981.

189502491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 189502491 - 2² = 189502487 is a prime.

It is a super-2 number, since 2×189502491² = 71822388190410162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189502499) 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, 31583746 + ... + 31583751.

It is an arithmetic number, because the mean of its divisors is an integer number (63167498).

Almost surely, 2^189502491 is an apocalyptic number.

189502491 is a deficient number, since it is larger than the sum of its proper divisors (63167501).

189502491 is an equidigital number, since it uses as much as digits as its factorization.

189502491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63167500.

The product of its (nonzero) digits is 25920, while the sum is 39.

The square root of 189502491 is about 13765.9903748332. The cubic root of 189502491 is about 574.3874924454.

The spelling of 189502491 in words is "one hundred eighty-nine million, five hundred two thousand, four hundred ninety-one".