120809091 has 32 divisors (see below), whose sum is σ = 177730560. Its totient is φ = 72543744.

The previous prime is 120809071. The next prime is 120809093. The reversal of 120809091 is 190908021.

It is not a de Polignac number, because 120809091 - 2⁶ = 120809027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (120809093) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 347980 + ... + 348326.

It is an arithmetic number, because the mean of its divisors is an integer number (5554080).

Almost surely, 2^120809091 is an apocalyptic number.

120809091 is a deficient number, since it is larger than the sum of its proper divisors (56921469).

120809091 is a wasteful number, since it uses less digits than its factorization.

120809091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555.

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 120809091 is about 10991.3188926534. The cubic root of 120809091 is about 494.3484827147.

The spelling of 120809091 in words is "one hundred twenty million, eight hundred nine thousand, ninety-one".