7840913 has 2 divisors, whose sum is σ = 7840914. Its totient is φ = 7840912.

The previous prime is 7840909. The next prime is 7840949. The reversal of 7840913 is 3190487.

7840913 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

7840913 is an esthetic number in base 7, because in such base its adjacent digits differ by 1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7219969 + 620944 = 2687^2 + 788^2 .

It is a cyclic number.

It is not a de Polignac number, because 7840913 - 2² = 7840909 is a prime.

It is a super-2 number, since 2×7840913² = 122959833347138, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7840913.

It is not a weakly prime, because it can be changed into another prime (7840013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3920456 + 3920457.

It is an arithmetic number, because the mean of its divisors is an integer number (3920457).

Almost surely, 2^7840913 is an apocalyptic number.

It is an amenable number.

7840913 is a deficient number, since it is larger than the sum of its proper divisors (1).

7840913 is an equidigital number, since it uses as much as digits as its factorization.

7840913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 7840913 is about 2800.1630309680. The cubic root of 7840913 is about 198.6653888757.

The spelling of 7840913 in words is "seven million, eight hundred forty thousand, nine hundred thirteen".