122361509 has 2 divisors, whose sum is σ = 122361510. Its totient is φ = 122361508.

The previous prime is 122361493. The next prime is 122361511. The reversal of 122361509 is 905163221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77176225 + 45185284 = 8785^2 + 6722^2 .

It is a cyclic number.

It is not a de Polignac number, because 122361509 - 2⁴ = 122361493 is a prime.

Together with 122361511, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122361409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61180754 + 61180755.

It is an arithmetic number, because the mean of its divisors is an integer number (61180755).

Almost surely, 2^122361509 is an apocalyptic number.

It is an amenable number.

122361509 is a deficient number, since it is larger than the sum of its proper divisors (1).

122361509 is an equidigital number, since it uses as much as digits as its factorization.

122361509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 122361509 is about 11061.7136556684. The cubic root of 122361509 is about 496.4569651089.

The spelling of 122361509 in words is "one hundred twenty-two million, three hundred sixty-one thousand, five hundred nine".