122638247 has 2 divisors, whose sum is σ = 122638248. Its totient is φ = 122638246.

The previous prime is 122638199. The next prime is 122638249. The reversal of 122638247 is 742836221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 122638247 - 2¹⁶ = 122572711 is a prime.

Together with 122638249, 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 (122638249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61319123 + 61319124.

It is an arithmetic number, because the mean of its divisors is an integer number (61319124).

Almost surely, 2^122638247 is an apocalyptic number.

122638247 is a deficient number, since it is larger than the sum of its proper divisors (1).

122638247 is an equidigital number, since it uses as much as digits as its factorization.

122638247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 35.

The square root of 122638247 is about 11074.2154123893. The cubic root of 122638247 is about 496.8309527137.

The spelling of 122638247 in words is "one hundred twenty-two million, six hundred thirty-eight thousand, two hundred forty-seven".