122197839 has 8 divisors (see below), whose sum is σ = 165162672. Its totient is φ = 80349120.

The previous prime is 122197837. The next prime is 122197843. The reversal of 122197839 is 938791221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 122197839 - 2¹ = 122197837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 122197839.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122197837) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 278772 + ... + 279209.

It is an arithmetic number, because the mean of its divisors is an integer number (20645334).

Almost surely, 2^122197839 is an apocalyptic number.

122197839 is a deficient number, since it is larger than the sum of its proper divisors (42964833).

122197839 is an equidigital number, since it uses as much as digits as its factorization.

122197839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558057.

The product of its digits is 54432, while the sum is 42.

The square root of 122197839 is about 11054.3131401277. The cubic root of 122197839 is about 496.2355137504.

The spelling of 122197839 in words is "one hundred twenty-two million, one hundred ninety-seven thousand, eight hundred thirty-nine".