120890999 has 4 divisors (see below), whose sum is σ = 121250064. Its totient is φ = 120531936.

The previous prime is 120890989. The next prime is 120891011. The reversal of 120890999 is 999098021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 999098021 = 1049 ⋅952429.

It is a cyclic number.

It is not a de Polignac number, because 120890999 - 2²⁰ = 119842423 is a prime.

It is a super-2 number, since 2×120890999² = 29229267278436002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120890989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179027 + ... + 179700.

It is an arithmetic number, because the mean of its divisors is an integer number (30312516).

Almost surely, 2^120890999 is an apocalyptic number.

120890999 is a deficient number, since it is larger than the sum of its proper divisors (359065).

120890999 is an equidigital number, since it uses as much as digits as its factorization.

120890999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359064.

The product of its (nonzero) digits is 104976, while the sum is 47.

The square root of 120890999 is about 10995.0442927712. The cubic root of 120890999 is about 494.4601794634.

The spelling of 120890999 in words is "one hundred twenty million, eight hundred ninety thousand, nine hundred ninety-nine".