122563839 has 16 divisors (see below), whose sum is σ = 165957120. Its totient is φ = 80446080.

The previous prime is 122563811. The next prime is 122563871. The reversal of 122563839 is 938365221.

It is not a de Polignac number, because 122563839 - 2⁵ = 122563807 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122563797 and 122563806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122563879) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138679 + ... + 139559.

It is an arithmetic number, because the mean of its divisors is an integer number (10372320).

Almost surely, 2^122563839 is an apocalyptic number.

122563839 is a deficient number, since it is larger than the sum of its proper divisors (43393281).

122563839 is an equidigital number, since it uses as much as digits as its factorization.

122563839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1550.

The product of its digits is 77760, while the sum is 39.

The square root of 122563839 is about 11070.8553870060. The cubic root of 122563839 is about 496.7304520474.

The spelling of 122563839 in words is "one hundred twenty-two million, five hundred sixty-three thousand, eight hundred thirty-nine".