7890513 has 4 divisors (see below), whose sum is σ = 10520688. Its totient is φ = 5260340.

The previous prime is 7890511. The next prime is 7890517. The reversal of 7890513 is 3150987.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7890513 - 2¹ = 7890511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7890511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1315083 + ... + 1315088.

It is an arithmetic number, because the mean of its divisors is an integer number (2630172).

Almost surely, 2^7890513 is an apocalyptic number.

It is an amenable number.

7890513 is a deficient number, since it is larger than the sum of its proper divisors (2630175).

7890513 is a wasteful number, since it uses less digits than its factorization.

7890513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2630174.

The product of its (nonzero) digits is 7560, while the sum is 33.

The square root of 7890513 is about 2809.0056959714. The cubic root of 7890513 is about 199.0834141019.

The spelling of 7890513 in words is "seven million, eight hundred ninety thousand, five hundred thirteen".