123145877 has 2 divisors, whose sum is σ = 123145878. Its totient is φ = 123145876.

The previous prime is 123145853. The next prime is 123145889. The reversal of 123145877 is 778541321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109537156 + 13608721 = 10466^2 + 3689^2 .

It is a cyclic number.

It is not a de Polignac number, because 123145877 - 2⁸ = 123145621 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123145877.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123105877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61572938 + 61572939.

It is an arithmetic number, because the mean of its divisors is an integer number (61572939).

Almost surely, 2^123145877 is an apocalyptic number.

It is an amenable number.

123145877 is a deficient number, since it is larger than the sum of its proper divisors (1).

123145877 is an equidigital number, since it uses as much as digits as its factorization.

123145877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47040, while the sum is 38.

The square root of 123145877 is about 11097.1112006684. Note that the first 3 decimals coincide. The cubic root of 123145877 is about 497.5155110775.

The spelling of 123145877 in words is "one hundred twenty-three million, one hundred forty-five thousand, eight hundred seventy-seven".