7890213 has 16 divisors (see below), whose sum is σ = 11158016. Its totient is φ = 4950720.

The previous prime is 7890209. The next prime is 7890217. The reversal of 7890213 is 3120987.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (7890209) and next prime (7890217).

It is not a de Polignac number, because 7890213 - 2² = 7890209 is a prime.

It is a super-2 number, since 2×7890213² = 124510922370738, which contains 22 as substring.

It is an Ulam number.

7890213 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7890217) 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 15 ways as a sum of consecutive naturals, for example, 2295 + ... + 4587.

It is an arithmetic number, because the mean of its divisors is an integer number (697376).

Almost surely, 2^7890213 is an apocalyptic number.

It is an amenable number.

7890213 is a deficient number, since it is larger than the sum of its proper divisors (3267803).

7890213 is a wasteful number, since it uses less digits than its factorization.

7890213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2364.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 7890213 is about 2808.9522957857. The cubic root of 7890213 is about 199.0808909968.

The spelling of 7890213 in words is "seven million, eight hundred ninety thousand, two hundred thirteen".