122345647 has 2 divisors, whose sum is σ = 122345648. Its totient is φ = 122345646.

The previous prime is 122345627. The next prime is 122345669. The reversal of 122345647 is 746543221.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122345647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122345627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61172823 + 61172824.

It is an arithmetic number, because the mean of its divisors is an integer number (61172824).

Almost surely, 2^122345647 is an apocalyptic number.

122345647 is a deficient number, since it is larger than the sum of its proper divisors (1).

122345647 is an equidigital number, since it uses as much as digits as its factorization.

122345647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 34.

The square root of 122345647 is about 11060.9966549132. The cubic root of 122345647 is about 496.4355119010.

Adding to 122345647 its reverse (746543221), we get a palindrome (868888868).

The spelling of 122345647 in words is "one hundred twenty-two million, three hundred forty-five thousand, six hundred forty-seven".