122553917 has 2 divisors, whose sum is σ = 122553918. Its totient is φ = 122553916.

The previous prime is 122553883. The next prime is 122553919. The reversal of 122553917 is 719355221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100922116 + 21631801 = 10046^2 + 4651^2 .

It is a cyclic number.

It is not a de Polignac number, because 122553917 - 2⁶ = 122553853 is a prime.

Together with 122553919, 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 (122553919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61276958 + 61276959.

It is an arithmetic number, because the mean of its divisors is an integer number (61276959).

Almost surely, 2^122553917 is an apocalyptic number.

It is an amenable number.

122553917 is a deficient number, since it is larger than the sum of its proper divisors (1).

122553917 is an equidigital number, since it uses as much as digits as its factorization.

122553917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18900, while the sum is 35.

The square root of 122553917 is about 11070.4072644144. The cubic root of 122553917 is about 496.7170476246.

The spelling of 122553917 in words is "one hundred twenty-two million, five hundred fifty-three thousand, nine hundred seventeen".