122909247 has 6 divisors (see below), whose sum is σ = 177535592. Its totient is φ = 81939492.

The previous prime is 122909243. The next prime is 122909261. The reversal of 122909247 is 742909221.

It is not a de Polignac number, because 122909247 - 2² = 122909243 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122909243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6828283 + ... + 6828300.

Almost surely, 2^122909247 is an apocalyptic number.

122909247 is a deficient number, since it is larger than the sum of its proper divisors (54626345).

122909247 is a wasteful number, since it uses less digits than its factorization.

122909247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13656589 (or 13656586 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 122909247 is about 11086.4442902132. Note that the first 3 decimals coincide. The cubic root of 122909247 is about 497.1966410655.

The spelling of 122909247 in words is "one hundred twenty-two million, nine hundred nine thousand, two hundred forty-seven".