120689297891 has 4 divisors (see below), whose sum is σ = 121158906312. Its totient is φ = 120219689472.

The previous prime is 120689297879. The next prime is 120689297893. The reversal of 120689297891 is 198792986021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120689297891 is a prime.

It is a super-3 number, since 3×120689297891³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120689297893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234803825 + ... + 234804338.

It is an arithmetic number, because the mean of its divisors is an integer number (30289726578).

Almost surely, 2^120689297891 is an apocalyptic number.

120689297891 is a deficient number, since it is larger than the sum of its proper divisors (469608421).

120689297891 is an equidigital number, since it uses as much as digits as its factorization.

120689297891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469608420.

The product of its (nonzero) digits is 7838208, while the sum is 62.

The spelling of 120689297891 in words is "one hundred twenty billion, six hundred eighty-nine million, two hundred ninety-seven thousand, eight hundred ninety-one".