122623621 has 2 divisors, whose sum is σ = 122623622. Its totient is φ = 122623620.

The previous prime is 122623597. The next prime is 122623639. The reversal of 122623621 is 126326221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111534721 + 11088900 = 10561^2 + 3330^2 .

It is a cyclic number.

It is not a de Polignac number, because 122623621 - 2⁷ = 122623493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122623691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61311810 + 61311811.

It is an arithmetic number, because the mean of its divisors is an integer number (61311811).

Almost surely, 2^122623621 is an apocalyptic number.

It is an amenable number.

122623621 is a deficient number, since it is larger than the sum of its proper divisors (1).

122623621 is an equidigital number, since it uses as much as digits as its factorization.

122623621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 25.

The square root of 122623621 is about 11073.5550298899. Note that the first 3 decimals coincide. The cubic root of 122623621 is about 496.8112010223.

Adding to 122623621 its reverse (126326221), we get a palindrome (248949842).

The spelling of 122623621 in words is "one hundred twenty-two million, six hundred twenty-three thousand, six hundred twenty-one".