123115049 has 2 divisors, whose sum is σ = 123115050. Its totient is φ = 123115048.

The previous prime is 123115033. The next prime is 123115051. The reversal of 123115049 is 940511321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81577024 + 41538025 = 9032^2 + 6445^2 .

It is a cyclic number.

It is not a de Polignac number, because 123115049 - 2⁴ = 123115033 is a prime.

Together with 123115051, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (123115009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61557524 + 61557525.

It is an arithmetic number, because the mean of its divisors is an integer number (61557525).

Almost surely, 2^123115049 is an apocalyptic number.

It is an amenable number.

123115049 is a deficient number, since it is larger than the sum of its proper divisors (1).

123115049 is an equidigital number, since it uses as much as digits as its factorization.

123115049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 123115049 is about 11095.7221035857. The cubic root of 123115049 is about 497.4739920581.

The spelling of 123115049 in words is "one hundred twenty-three million, one hundred fifteen thousand, forty-nine".