7905013 has 4 divisors (see below), whose sum is σ = 8118700. Its totient is φ = 7691328.

The previous prime is 7904999. The next prime is 7905043. The reversal of 7905013 is 3105097.

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 5414929 + 2490084 = 2327^2 + 1578^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7905013 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7905043) 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, 106788 + ... + 106861.

It is an arithmetic number, because the mean of its divisors is an integer number (2029675).

Almost surely, 2^7905013 is an apocalyptic number.

It is an amenable number.

7905013 is a deficient number, since it is larger than the sum of its proper divisors (213687).

7905013 is a wasteful number, since it uses less digits than its factorization.

7905013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213686.

The product of its (nonzero) digits is 945, while the sum is 25.

The square root of 7905013 is about 2811.5854957657. The cubic root of 7905013 is about 199.2052880136.

The spelling of 7905013 in words is "seven million, nine hundred five thousand, thirteen".