7945213 has 2 divisors, whose sum is σ = 7945214. Its totient is φ = 7945212.

The previous prime is 7945199. The next prime is 7945219. The reversal of 7945213 is 3125497.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4173849 + 3771364 = 2043^2 + 1942^2 .

It is an emirp because it is prime and its reverse (3125497) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7945213 - 2⁵ = 7945181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7945219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3972606 + 3972607.

It is an arithmetic number, because the mean of its divisors is an integer number (3972607).

Almost surely, 2^7945213 is an apocalyptic number.

It is an amenable number.

7945213 is a deficient number, since it is larger than the sum of its proper divisors (1).

7945213 is an equidigital number, since it uses as much as digits as its factorization.

7945213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 31.

The square root of 7945213 is about 2818.7254211789. The cubic root of 7945213 is about 199.5423954556.

The spelling of 7945213 in words is "seven million, nine hundred forty-five thousand, two hundred thirteen".