122557679 has 2 divisors, whose sum is σ = 122557680. Its totient is φ = 122557678.

The previous prime is 122557661. The next prime is 122557681. The reversal of 122557679 is 976755221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 122557679 - 2⁸ = 122557423 is a prime.

It is a super-3 number, since 3×122557679³ (a number of 25 digits) contains 333 as substring.

Together with 122557681, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122557649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61278839 + 61278840.

It is an arithmetic number, because the mean of its divisors is an integer number (61278840).

Almost surely, 2^122557679 is an apocalyptic number.

122557679 is a deficient number, since it is larger than the sum of its proper divisors (1).

122557679 is an equidigital number, since it uses as much as digits as its factorization.

122557679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 264600, while the sum is 44.

The square root of 122557679 is about 11070.5771755586. The cubic root of 122557679 is about 496.7221300963.

The spelling of 122557679 in words is "one hundred twenty-two million, five hundred fifty-seven thousand, six hundred seventy-nine".