120091813 has 8 divisors (see below), whose sum is σ = 124683480. Its totient is φ = 115530240.

The previous prime is 120091801. The next prime is 120091843. The reversal of 120091813 is 318190021.

It can be written as a sum of positive squares in 4 ways, for example, as 48469444 + 71622369 = 6962^2 + 8463^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 120091813 - 2⁵ = 120091781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120091843) 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 7 ways as a sum of consecutive naturals, for example, 781 + ... + 15517.

It is an arithmetic number, because the mean of its divisors is an integer number (15585435).

Almost surely, 2^120091813 is an apocalyptic number.

It is an amenable number.

120091813 is a deficient number, since it is larger than the sum of its proper divisors (4591667).

120091813 is a wasteful number, since it uses less digits than its factorization.

120091813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15047.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 120091813 is about 10958.6410197615. The cubic root of 120091813 is about 493.3681774249.

The spelling of 120091813 in words is "one hundred twenty million, ninety-one thousand, eight hundred thirteen".