122279491 has 2 divisors, whose sum is σ = 122279492. Its totient is φ = 122279490.

The previous prime is 122279411. The next prime is 122279527. The reversal of 122279491 is 194972221.

It is a strong prime.

It is an emirp because it is prime and its reverse (194972221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 122279491 - 2¹¹ = 122277443 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122279491.

It is not a weakly prime, because it can be changed into another prime (122279411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61139745 + 61139746.

It is an arithmetic number, because the mean of its divisors is an integer number (61139746).

Almost surely, 2^122279491 is an apocalyptic number.

122279491 is a deficient number, since it is larger than the sum of its proper divisors (1).

122279491 is an equidigital number, since it uses as much as digits as its factorization.

122279491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 37.

The square root of 122279491 is about 11058.0057424474. The cubic root of 122279491 is about 496.3460165249.

The spelling of 122279491 in words is "one hundred twenty-two million, two hundred seventy-nine thousand, four hundred ninety-one".