7969813 has 2 divisors, whose sum is σ = 7969814. Its totient is φ = 7969812.

The previous prime is 7969807. The next prime is 7969823. The reversal of 7969813 is 3189697.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7969329 + 484 = 2823^2 + 22^2 .

It is a cyclic number.

It is not a de Polignac number, because 7969813 - 2⁵ = 7969781 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 7969813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7969823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3984906 + 3984907.

It is an arithmetic number, because the mean of its divisors is an integer number (3984907).

Almost surely, 2^7969813 is an apocalyptic number.

It is an amenable number.

7969813 is a deficient number, since it is larger than the sum of its proper divisors (1).

7969813 is an equidigital number, since it uses as much as digits as its factorization.

7969813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 43.

The square root of 7969813 is about 2823.0857231051. The cubic root of 7969813 is about 199.7481245937.

It can be divided in two parts, 796 and 9813, that added together give a square (10609 = 103²).

The spelling of 7969813 in words is "seven million, nine hundred sixty-nine thousand, eight hundred thirteen".