189516506 has 8 divisors (see below), whose sum is σ = 284568660. Its totient is φ = 94660288.

The previous prime is 189516491. The next prime is 189516517. The reversal of 189516506 is 605615981.

It can be written as a sum of positive squares in 2 ways, for example, as 179962225 + 9554281 = 13415^2 + 3091^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46541 + ... + 50448.

Almost surely, 2^189516506 is an apocalyptic number.

189516506 is a deficient number, since it is larger than the sum of its proper divisors (95052154).

189516506 is an equidigital number, since it uses as much as digits as its factorization.

189516506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97968.

The product of its (nonzero) digits is 64800, while the sum is 41.

The square root of 189516506 is about 13766.4994097991. The cubic root of 189516506 is about 574.4016520522.

The spelling of 189516506 in words is "one hundred eighty-nine million, five hundred sixteen thousand, five hundred six".