7999213 has 4 divisors (see below), whose sum is σ = 8074080. Its totient is φ = 7924348.

The previous prime is 7999207. The next prime is 7999241. The reversal of 7999213 is 3129997.

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, and also an emirpimes, since its reverse is a distinct semiprime: 3129997 = 13 ⋅240769.

It is a cyclic number.

It is not a de Polignac number, because 7999213 - 2⁹ = 7998701 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 (7999283) 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, 37273 + ... + 37486.

It is an arithmetic number, because the mean of its divisors is an integer number (2018520).

Almost surely, 2^7999213 is an apocalyptic number.

It is an amenable number.

7999213 is a deficient number, since it is larger than the sum of its proper divisors (74867).

7999213 is a wasteful number, since it uses less digits than its factorization.

7999213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74866.

The product of its digits is 30618, while the sum is 40.

The square root of 7999213 is about 2828.2879980653. The cubic root of 7999213 is about 199.9934414516.

The spelling of 7999213 in words is "seven million, nine hundred ninety-nine thousand, two hundred thirteen".