120890091 has 16 divisors (see below), whose sum is σ = 185348864. Its totient is φ = 68654304.

The previous prime is 120890089. The next prime is 120890101. The reversal of 120890091 is 190098021.

It is not a de Polignac number, because 120890091 - 2¹ = 120890089 is a prime.

It is a super-2 number, since 2×120890091² = 29228828203976562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120890291) 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, 14236 + ... + 21081.

It is an arithmetic number, because the mean of its divisors is an integer number (11584304).

Almost surely, 2^120890091 is an apocalyptic number.

120890091 is a deficient number, since it is larger than the sum of its proper divisors (64458773).

120890091 is a wasteful number, since it uses less digits than its factorization.

120890091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35490.

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

The square root of 120890091 is about 10995.0030013638. The cubic root of 120890091 is about 494.4589415136.

The spelling of 120890091 in words is "one hundred twenty million, eight hundred ninety thousand, ninety-one".