7918913 has 2 divisors, whose sum is σ = 7918914. Its totient is φ = 7918912.

The previous prime is 7918909. The next prime is 7918951. The reversal of 7918913 is 3198197.

It is an a-pointer prime, because the next prime (7918951) can be obtained adding 7918913 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6801664 + 1117249 = 2608^2 + 1057^2 .

It is an emirp because it is prime and its reverse (3198197) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7918913 - 2² = 7918909 is a prime.

It is not a weakly prime, because it can be changed into another prime (7918613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3959456 + 3959457.

It is an arithmetic number, because the mean of its divisors is an integer number (3959457).

Almost surely, 2^7918913 is an apocalyptic number.

It is an amenable number.

7918913 is a deficient number, since it is larger than the sum of its proper divisors (1).

7918913 is an equidigital number, since it uses as much as digits as its factorization.

7918913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 38.

The square root of 7918913 is about 2814.0563249516. The cubic root of 7918913 is about 199.3219790353.

The spelling of 7918913 in words is "seven million, nine hundred eighteen thousand, nine hundred thirteen".