7994165213 has 4 divisors (see below), whose sum is σ = 8002554588. Its totient is φ = 7985775840.

The previous prime is 7994165197. The next prime is 7994165261. The reversal of 7994165213 is 3125614997.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3125614997 = 37 ⋅84476081.

It can be written as a sum of positive squares in 2 ways, for example, as 6390723364 + 1603441849 = 79942^2 + 40043^2 .

It is a cyclic number.

It is not a de Polignac number, because 7994165213 - 2⁴ = 7994165197 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 (7994135213) 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, 4193258 + ... + 4195163.

It is an arithmetic number, because the mean of its divisors is an integer number (2000638647).

Almost surely, 2^7994165213 is an apocalyptic number.

It is an amenable number.

7994165213 is a deficient number, since it is larger than the sum of its proper divisors (8389375).

7994165213 is an equidigital number, since it uses as much as digits as its factorization.

7994165213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8389374.

The product of its digits is 408240, while the sum is 47.

The square root of 7994165213 is about 89410.0956995350. The cubic root of 7994165213 is about 1999.5136494912.

The spelling of 7994165213 in words is "seven billion, nine hundred ninety-four million, one hundred sixty-five thousand, two hundred thirteen".