122572189 has 2 divisors, whose sum is σ = 122572190. Its totient is φ = 122572188.

The previous prime is 122572187. The next prime is 122572201. The reversal of 122572189 is 981275221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110944089 + 11628100 = 10533^2 + 3410^2 .

It is an emirp because it is prime and its reverse (981275221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 122572189 - 2¹ = 122572187 is a prime.

Together with 122572187, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122572181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61286094 + 61286095.

It is an arithmetic number, because the mean of its divisors is an integer number (61286095).

Almost surely, 2^122572189 is an apocalyptic number.

It is an amenable number.

122572189 is a deficient number, since it is larger than the sum of its proper divisors (1).

122572189 is an equidigital number, since it uses as much as digits as its factorization.

122572189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 37.

The square root of 122572189 is about 11071.2324968813. The cubic root of 122572189 is about 496.7417321692.

The spelling of 122572189 in words is "one hundred twenty-two million, five hundred seventy-two thousand, one hundred eighty-nine".