122615879 has 2 divisors, whose sum is σ = 122615880. Its totient is φ = 122615878.

The previous prime is 122615863. The next prime is 122615887. The reversal of 122615879 is 978516221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 122615879 - 2⁴ = 122615863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122615279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61307939 + 61307940.

It is an arithmetic number, because the mean of its divisors is an integer number (61307940).

Almost surely, 2^122615879 is an apocalyptic number.

122615879 is a deficient number, since it is larger than the sum of its proper divisors (1).

122615879 is an equidigital number, since it uses as much as digits as its factorization.

122615879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 41.

The square root of 122615879 is about 11073.2054528036. The cubic root of 122615879 is about 496.8007451976.

The spelling of 122615879 in words is "one hundred twenty-two million, six hundred fifteen thousand, eight hundred seventy-nine".