122638947 has 16 divisors (see below), whose sum is σ = 166490112. Its totient is φ = 80287200.

The previous prime is 122638937. The next prime is 122638961. The reversal of 122638947 is 749836221.

It is not a de Polignac number, because 122638947 - 2⁴ = 122638931 is a prime.

It is a super-2 number, since 2×122638947² = 30080622642537618, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 122638899 and 122638908.

It is not an unprimeable number, because it can be changed into a prime (122638927) 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, 36888 + ... + 40074.

It is an arithmetic number, because the mean of its divisors is an integer number (10405632).

Almost surely, 2^122638947 is an apocalyptic number.

122638947 is a deficient number, since it is larger than the sum of its proper divisors (43851165).

122638947 is a wasteful number, since it uses less digits than its factorization.

122638947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3418.

The product of its digits is 145152, while the sum is 42.

The square root of 122638947 is about 11074.2470172920. The cubic root of 122638947 is about 496.8318979897.

The spelling of 122638947 in words is "one hundred twenty-two million, six hundred thirty-eight thousand, nine hundred forty-seven".