7890493 has 4 divisors (see below), whose sum is σ = 8497468. Its totient is φ = 7283520.

The previous prime is 7890479. The next prime is 7890503. The reversal of 7890493 is 3940987.

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 2424249 + 5466244 = 1557^2 + 2338^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7890493 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 (7890413) 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 3 ways as a sum of consecutive naturals, for example, 303468 + ... + 303493.

It is an arithmetic number, because the mean of its divisors is an integer number (2124367).

Almost surely, 2^7890493 is an apocalyptic number.

It is an amenable number.

7890493 is a deficient number, since it is larger than the sum of its proper divisors (606975).

7890493 is a wasteful number, since it uses less digits than its factorization.

7890493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606974.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 7890493 is about 2809.0021359906. The cubic root of 7890493 is about 199.0832458969.

The spelling of 7890493 in words is "seven million, eight hundred ninety thousand, four hundred ninety-three".