122636197 has 4 divisors (see below), whose sum is σ = 124466656. Its totient is φ = 120805740.

The previous prime is 122636191. The next prime is 122636209. The reversal of 122636197 is 791636221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 791636221 = 89 ⋅8894789.

It is a cyclic number.

It is not a de Polignac number, because 122636197 - 2¹⁹ = 122111909 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 (122636191) 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, 915129 + ... + 915262.

It is an arithmetic number, because the mean of its divisors is an integer number (31116664).

Almost surely, 2^122636197 is an apocalyptic number.

It is an amenable number.

122636197 is a deficient number, since it is larger than the sum of its proper divisors (1830459).

122636197 is an equidigital number, since it uses as much as digits as its factorization.

122636197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1830458.

The product of its digits is 27216, while the sum is 37.

The square root of 122636197 is about 11074.1228546554. The cubic root of 122636197 is about 496.8281843844.

The spelling of 122636197 in words is "one hundred twenty-two million, six hundred thirty-six thousand, one hundred ninety-seven".