7920113 has 8 divisors (see below), whose sum is σ = 8437608. Its totient is φ = 7408384.

The previous prime is 7920091. The next prime is 7920139. The reversal of 7920113 is 3110297.

It can be written as a sum of positive squares in 4 ways, for example, as 3564544 + 4355569 = 1888^2 + 2087^2 .

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 7920113 - 2¹⁰ = 7919089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7920163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1595 + ... + 4287.

It is an arithmetic number, because the mean of its divisors is an integer number (1054701).

Almost surely, 2^7920113 is an apocalyptic number.

It is an amenable number.

7920113 is a deficient number, since it is larger than the sum of its proper divisors (517495).

7920113 is a wasteful number, since it uses less digits than its factorization.

7920113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2883.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 7920113 is about 2814.2695322232. The cubic root of 7920113 is about 199.3320466752.

The spelling of 7920113 in words is "seven million, nine hundred twenty thousand, one hundred thirteen".