185842023989 has 2 divisors, whose sum is σ = 185842023990. Its totient is φ = 185842023988.

The previous prime is 185842023947. The next prime is 185842024019. The reversal of 185842023989 is 989320248581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179022072100 + 6819951889 = 423110^2 + 82583^2 .

It is a cyclic number.

It is not a de Polignac number, because 185842023989 - 2²⁸ = 185573588533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (185842023089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 92921011994 + 92921011995.

It is an arithmetic number, because the mean of its divisors is an integer number (92921011995).

Almost surely, 2^185842023989 is an apocalyptic number.

It is an amenable number.

185842023989 is a deficient number, since it is larger than the sum of its proper divisors (1).

185842023989 is an equidigital number, since it uses as much as digits as its factorization.

185842023989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9953280, while the sum is 59.

The spelling of 185842023989 in words is "one hundred eighty-five billion, eight hundred forty-two million, twenty-three thousand, nine hundred eighty-nine".