13120073 has 4 divisors (see below), whose sum is σ = 13891860. Its totient is φ = 12348288.

The previous prime is 13120069. The next prime is 13120087. The reversal of 13120073 is 37002131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8048569 + 5071504 = 2837^2 + 2252^2 .

It is a cyclic number.

It is not a de Polignac number, because 13120073 - 2² = 13120069 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 771769 = 13120073 / (1 + 3 + 1 + 2 + 0 + 0 + 7 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13120273) 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, 385868 + ... + 385901.

It is an arithmetic number, because the mean of its divisors is an integer number (3472965).

Almost surely, 2^13120073 is an apocalyptic number.

It is an amenable number.

13120073 is a deficient number, since it is larger than the sum of its proper divisors (771787).

13120073 is an equidigital number, since it uses as much as digits as its factorization.

13120073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771786.

The product of its (nonzero) digits is 126, while the sum is 17.

The square root of 13120073 is about 3622.1641321177. The cubic root of 13120073 is about 235.8551790318.

The spelling of 13120073 in words is "thirteen million, one hundred twenty thousand, seventy-three".