123579977 has 2 divisors, whose sum is σ = 123579978. Its totient is φ = 123579976.

The previous prime is 123579913. The next prime is 123579983. The reversal of 123579977 is 779975321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120538441 + 3041536 = 10979^2 + 1744^2 .

It is an emirp because it is prime and its reverse (779975321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123579977 - 2⁶ = 123579913 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (123579877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61789988 + 61789989.

It is an arithmetic number, because the mean of its divisors is an integer number (61789989).

Almost surely, 2^123579977 is an apocalyptic number.

It is an amenable number.

123579977 is a deficient number, since it is larger than the sum of its proper divisors (1).

123579977 is an equidigital number, since it uses as much as digits as its factorization.

123579977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 833490, while the sum is 50.

The square root of 123579977 is about 11116.6531384226. The cubic root of 123579977 is about 498.0994207507.

The spelling of 123579977 in words is "one hundred twenty-three million, five hundred seventy-nine thousand, nine hundred seventy-seven".