189423411977 has 2 divisors, whose sum is σ = 189423411978. Its totient is φ = 189423411976.

The previous prime is 189423411953. The next prime is 189423412069. The reversal of 189423411977 is 779114324981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 170251963456 + 19171448521 = 412616^2 + 138461^2 .

It is a cyclic number.

It is not a de Polignac number, because 189423411977 - 2²⁴ = 189406634761 is a prime.

It is not a weakly prime, because it can be changed into another prime (189423411377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94711705988 + 94711705989.

It is an arithmetic number, because the mean of its divisors is an integer number (94711705989).

Almost surely, 2^189423411977 is an apocalyptic number.

It is an amenable number.

189423411977 is a deficient number, since it is larger than the sum of its proper divisors (1).

189423411977 is an equidigital number, since it uses as much as digits as its factorization.

189423411977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3048192, while the sum is 56.

The spelling of 189423411977 in words is "one hundred eighty-nine billion, four hundred twenty-three million, four hundred eleven thousand, nine hundred seventy-seven".