23977443173 has 2 divisors, whose sum is σ = 23977443174. Its totient is φ = 23977443172.

The previous prime is 23977443163. The next prime is 23977443199. The reversal of 23977443173 is 37134477932.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16453962529 + 7523480644 = 128273^2 + 86738^2 .

It is a cyclic number.

It is not a de Polignac number, because 23977443173 - 2⁶ = 23977443109 is a prime.

It is a super-2 number, since 2×23977443173² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23977443143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11988721586 + 11988721587.

It is an arithmetic number, because the mean of its divisors is an integer number (11988721587).

Almost surely, 2^23977443173 is an apocalyptic number.

It is an amenable number.

23977443173 is a deficient number, since it is larger than the sum of its proper divisors (1).

23977443173 is an equidigital number, since it uses as much as digits as its factorization.

23977443173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2667168, while the sum is 50.

The spelling of 23977443173 in words is "twenty-three billion, nine hundred seventy-seven million, four hundred forty-three thousand, one hundred seventy-three".