122432639 has 4 divisors (see below), whose sum is σ = 139923024. Its totient is φ = 104942256.

The previous prime is 122432633. The next prime is 122432641. The reversal of 122432639 is 936234221.

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-122432639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122432633) 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, 8745182 + ... + 8745195.

It is an arithmetic number, because the mean of its divisors is an integer number (34980756).

Almost surely, 2^122432639 is an apocalyptic number.

122432639 is a deficient number, since it is larger than the sum of its proper divisors (17490385).

122432639 is an equidigital number, since it uses as much as digits as its factorization.

122432639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17490384.

The product of its digits is 15552, while the sum is 32.

The square root of 122432639 is about 11064.9283323481. The cubic root of 122432639 is about 496.5531449829.

The spelling of 122432639 in words is "one hundred twenty-two million, four hundred thirty-two thousand, six hundred thirty-nine".