120799891 has 4 divisors (see below), whose sum is σ = 127157800. Its totient is φ = 114441984.

The previous prime is 120799883. The next prime is 120799907. The reversal of 120799891 is 198997021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 198997021 = 137 ⋅1452533.

It is a cyclic number.

It is not a de Polignac number, because 120799891 - 2³ = 120799883 is a prime.

It is a super-2 number, since 2×120799891² = 29185227331223762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120799801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3178926 + ... + 3178963.

It is an arithmetic number, because the mean of its divisors is an integer number (31789450).

Almost surely, 2^120799891 is an apocalyptic number.

120799891 is a deficient number, since it is larger than the sum of its proper divisors (6357909).

120799891 is an equidigital number, since it uses as much as digits as its factorization.

120799891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6357908.

The product of its (nonzero) digits is 81648, while the sum is 46.

The square root of 120799891 is about 10990.9003725809. The cubic root of 120799891 is about 494.3359336550.

The spelling of 120799891 in words is "one hundred twenty million, seven hundred ninety-nine thousand, eight hundred ninety-one".