122553817 has 2 divisors, whose sum is σ = 122553818. Its totient is φ = 122553816.

The previous prime is 122553803. The next prime is 122553853. The reversal of 122553817 is 718355221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78517321 + 44036496 = 8861^2 + 6636^2 .

It is an emirp because it is prime and its reverse (718355221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122553817 is a prime.

It is a super-2 number, since 2×122553817² = 30038876122538978, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (122553877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61276908 + 61276909.

It is an arithmetic number, because the mean of its divisors is an integer number (61276909).

Almost surely, 2^122553817 is an apocalyptic number.

122553817 is the 6392-nd hex number.

It is an amenable number.

122553817 is a deficient number, since it is larger than the sum of its proper divisors (1).

122553817 is an equidigital number, since it uses as much as digits as its factorization.

122553817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16800, while the sum is 34.

The square root of 122553817 is about 11070.4027478678. The cubic root of 122553817 is about 496.7169125230.

The spelling of 122553817 in words is "one hundred twenty-two million, five hundred fifty-three thousand, eight hundred seventeen".