122919309 has 16 divisors (see below), whose sum is σ = 187978240. Its totient is φ = 79302240.

The previous prime is 122919289. The next prime is 122919311. The reversal of 122919309 is 903919221.

It is a happy number.

It is not a de Polignac number, because 122919309 - 2¹⁵ = 122886541 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 (122919319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72592 + ... + 74265.

It is an arithmetic number, because the mean of its divisors is an integer number (11748640).

Almost surely, 2^122919309 is an apocalyptic number.

It is an amenable number.

122919309 is a deficient number, since it is larger than the sum of its proper divisors (65058931).

122919309 is a wasteful number, since it uses less digits than its factorization.

122919309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146897 (or 146891 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 122919309 is about 11086.8980783626. The cubic root of 122919309 is about 497.2102084095.

The spelling of 122919309 in words is "one hundred twenty-two million, nine hundred nineteen thousand, three hundred nine".