189747023 has 2 divisors, whose sum is σ = 189747024. Its totient is φ = 189747022.

The previous prime is 189747011. The next prime is 189747067. The reversal of 189747023 is 320747981.

It is a weak prime.

It is an emirp because it is prime and its reverse (320747981) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189747023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189747073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94873511 + 94873512.

It is an arithmetic number, because the mean of its divisors is an integer number (94873512).

Almost surely, 2^189747023 is an apocalyptic number.

189747023 is a deficient number, since it is larger than the sum of its proper divisors (1).

189747023 is an equidigital number, since it uses as much as digits as its factorization.

189747023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 189747023 is about 13774.8692552779. The cubic root of 189747023 is about 574.6344474247.

The spelling of 189747023 in words is "one hundred eighty-nine million, seven hundred forty-seven thousand, twenty-three".