122811439 has 2 divisors, whose sum is σ = 122811440. Its totient is φ = 122811438.

The previous prime is 122811427. The next prime is 122811461. The reversal of 122811439 is 934118221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 122811439 - 2⁵ = 122811407 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122811439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122812439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61405719 + 61405720.

It is an arithmetic number, because the mean of its divisors is an integer number (61405720).

Almost surely, 2^122811439 is an apocalyptic number.

122811439 is a deficient number, since it is larger than the sum of its proper divisors (1).

122811439 is an equidigital number, since it uses as much as digits as its factorization.

122811439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 31.

The square root of 122811439 is about 11082.0322594730. The cubic root of 122811439 is about 497.0647206570.

The spelling of 122811439 in words is "one hundred twenty-two million, eight hundred eleven thousand, four hundred thirty-nine".