185045947 has 2 divisors, whose sum is σ = 185045948. Its totient is φ = 185045946.

The previous prime is 185045923. The next prime is 185045953. The reversal of 185045947 is 749540581.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-185045947 is a prime.

It is a super-2 number, since 2×185045947² = 68484005002253618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (185045347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 92522973 + 92522974.

It is an arithmetic number, because the mean of its divisors is an integer number (92522974).

Almost surely, 2^185045947 is an apocalyptic number.

185045947 is a deficient number, since it is larger than the sum of its proper divisors (1).

185045947 is an equidigital number, since it uses as much as digits as its factorization.

185045947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 201600, while the sum is 43.

The square root of 185045947 is about 13603.1594491868. The cubic root of 185045947 is about 569.8490900382.

The spelling of 185045947 in words is "one hundred eighty-five million, forty-five thousand, nine hundred forty-seven".