189654947 has 2 divisors, whose sum is σ = 189654948. Its totient is φ = 189654946.

The previous prime is 189654937. The next prime is 189654977. The reversal of 189654947 is 749456981.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189654947 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (189654937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94827473 + 94827474.

It is an arithmetic number, because the mean of its divisors is an integer number (94827474).

Almost surely, 2^189654947 is an apocalyptic number.

189654947 is a deficient number, since it is larger than the sum of its proper divisors (1).

189654947 is an equidigital number, since it uses as much as digits as its factorization.

189654947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 53.

The square root of 189654947 is about 13771.5266764437. The cubic root of 189654947 is about 574.5414839952.

The spelling of 189654947 in words is "one hundred eighty-nine million, six hundred fifty-four thousand, nine hundred forty-seven".