122644739 has 4 divisors (see below), whose sum is σ = 140165424. Its totient is φ = 105124056.

The previous prime is 122644733. The next prime is 122644757. The reversal of 122644739 is 937446221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122644739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (122644733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8760332 + ... + 8760345.

It is an arithmetic number, because the mean of its divisors is an integer number (35041356).

Almost surely, 2^122644739 is an apocalyptic number.

122644739 is a deficient number, since it is larger than the sum of its proper divisors (17520685).

122644739 is an equidigital number, since it uses as much as digits as its factorization.

122644739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17520684.

The product of its digits is 72576, while the sum is 38.

The square root of 122644739 is about 11074.5085218261. The cubic root of 122644739 is about 496.8397193361.

The spelling of 122644739 in words is "one hundred twenty-two million, six hundred forty-four thousand, seven hundred thirty-nine".