122699409 has 32 divisors (see below), whose sum is σ = 191600640. Its totient is φ = 68397312.

The previous prime is 122699407. The next prime is 122699413. The reversal of 122699409 is 904996221.

It is not a de Polignac number, because 122699409 - 2¹ = 122699407 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (122699407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 206617 + ... + 207209.

It is an arithmetic number, because the mean of its divisors is an integer number (5987520).

Almost surely, 2^122699409 is an apocalyptic number.

It is an amenable number.

122699409 is a deficient number, since it is larger than the sum of its proper divisors (68901231).

122699409 is a wasteful number, since it uses less digits than its factorization.

122699409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 122699409 is about 11076.9765279159. The cubic root of 122699409 is about 496.9135319669.

The spelling of 122699409 in words is "one hundred twenty-two million, six hundred ninety-nine thousand, four hundred nine".