122696639 has 4 divisors (see below), whose sum is σ = 132134856. Its totient is φ = 113258424.

The previous prime is 122696627. The next prime is 122696647. The reversal of 122696639 is 936696221.

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

It is a cyclic number.

It is not a de Polignac number, because 122696639 - 2⁸ = 122696383 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 122696639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122696669) 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, 4719089 + ... + 4719114.

It is an arithmetic number, because the mean of its divisors is an integer number (33033714).

Almost surely, 2^122696639 is an apocalyptic number.

122696639 is a deficient number, since it is larger than the sum of its proper divisors (9438217).

122696639 is an equidigital number, since it uses as much as digits as its factorization.

122696639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9438216.

The product of its digits is 209952, while the sum is 44.

The square root of 122696639 is about 11076.8514930913. The cubic root of 122696639 is about 496.9097925823.

The spelling of 122696639 in words is "one hundred twenty-two million, six hundred ninety-six thousand, six hundred thirty-nine".