189004947 has 4 divisors (see below), whose sum is σ = 252006600. Its totient is φ = 126003296.

The previous prime is 189004931. The next prime is 189004969. The reversal of 189004947 is 749400981.

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

It is a cyclic number.

It is not a de Polignac number, because 189004947 - 2⁴ = 189004931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 189004899 and 189004908.

It is not an unprimeable number, because it can be changed into a prime (189004927) 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, 31500822 + ... + 31500827.

It is an arithmetic number, because the mean of its divisors is an integer number (63001650).

Almost surely, 2^189004947 is an apocalyptic number.

189004947 is a deficient number, since it is larger than the sum of its proper divisors (63001653).

189004947 is an equidigital number, since it uses as much as digits as its factorization.

189004947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63001652.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 189004947 is about 13747.9070043407. The cubic root of 189004947 is about 573.8843618095.

The spelling of 189004947 in words is "one hundred eighty-nine million, four thousand, nine hundred forty-seven".