123243877 has 2 divisors, whose sum is σ = 123243878. Its totient is φ = 123243876.

The previous prime is 123243853. The next prime is 123243893. The reversal of 123243877 is 778342321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116618401 + 6625476 = 10799^2 + 2574^2 .

It is an emirp because it is prime and its reverse (778342321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123243877 - 2⁷ = 123243749 is a prime.

It is a super-2 number, since 2×123243877² = 30378106435982258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123243847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61621938 + 61621939.

It is an arithmetic number, because the mean of its divisors is an integer number (61621939).

Almost surely, 2^123243877 is an apocalyptic number.

It is an amenable number.

123243877 is a deficient number, since it is larger than the sum of its proper divisors (1).

123243877 is an equidigital number, since it uses as much as digits as its factorization.

123243877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 37.

The square root of 123243877 is about 11101.5258861113. The cubic root of 123243877 is about 497.6474510538.

The spelling of 123243877 in words is "one hundred twenty-three million, two hundred forty-three thousand, eight hundred seventy-seven".