122639039 has 2 divisors, whose sum is σ = 122639040. Its totient is φ = 122639038.

The previous prime is 122639021. The next prime is 122639089. The reversal of 122639039 is 930936221.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122639039 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122639009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61319519 + 61319520.

It is an arithmetic number, because the mean of its divisors is an integer number (61319520).

Almost surely, 2^122639039 is an apocalyptic number.

122639039 is a deficient number, since it is larger than the sum of its proper divisors (1).

122639039 is an equidigital number, since it uses as much as digits as its factorization.

122639039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 122639039 is about 11074.2511710725. The cubic root of 122639039 is about 496.8320222258.

The spelling of 122639039 in words is "one hundred twenty-two million, six hundred thirty-nine thousand, thirty-nine".