189469995947 has 2 divisors, whose sum is σ = 189469995948. Its totient is φ = 189469995946.

The previous prime is 189469995797. The next prime is 189469995959. The reversal of 189469995947 is 749599964981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 189469995947 - 2⁸ = 189469995691 is a prime.

It is not a weakly prime, because it can be changed into another prime (189469995347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94734997973 + 94734997974.

It is an arithmetic number, because the mean of its divisors is an integer number (94734997974).

Almost surely, 2^189469995947 is an apocalyptic number.

189469995947 is a deficient number, since it is larger than the sum of its proper divisors (1).

189469995947 is an equidigital number, since it uses as much as digits as its factorization.

189469995947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1587237120, while the sum is 80.

The spelling of 189469995947 in words is "one hundred eighty-nine billion, four hundred sixty-nine million, nine hundred ninety-five thousand, nine hundred forty-seven".