120681309 has 16 divisors (see below), whose sum is σ = 188866688. Its totient is φ = 67096512.

The previous prime is 120681307. The next prime is 120681311. The reversal of 120681309 is 903186021.

It is an interprime number because it is at equal distance from previous prime (120681307) and next prime (120681311).

It is not a de Polignac number, because 120681309 - 2¹ = 120681307 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120681307) 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, 76882 + ... + 78435.

It is an arithmetic number, because the mean of its divisors is an integer number (11804168).

Almost surely, 2^120681309 is an apocalyptic number.

It is an amenable number.

120681309 is a deficient number, since it is larger than the sum of its proper divisors (68185379).

120681309 is a wasteful number, since it uses less digits than its factorization.

120681309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155364.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 120681309 is about 10985.5044945601. The cubic root of 120681309 is about 494.1741273965.

The spelling of 120681309 in words is "one hundred twenty million, six hundred eighty-one thousand, three hundred nine".