7816913 has 8 divisors (see below), whose sum is σ = 8534568. Its totient is φ = 7115904.

The previous prime is 7816891. The next prime is 7816931. The reversal of 7816913 is 3196187.

7816913 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 677329 + 7139584 = 823^2 + 2672^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7816913 - 2²² = 3622609 is a prime.

It is a super-2 number, since 2×7816913² = 122208257699138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7816933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3170 + ... + 5067.

It is an arithmetic number, because the mean of its divisors is an integer number (1066821).

Almost surely, 2^7816913 is an apocalyptic number.

7816913 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

It is an amenable number.

7816913 is a deficient number, since it is larger than the sum of its proper divisors (717655).

7816913 is a wasteful number, since it uses less digits than its factorization.

7816913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8323.

The product of its digits is 9072, while the sum is 35.

The square root of 7816913 is about 2795.8742818660. The cubic root of 7816913 is about 198.4624855347.

The spelling of 7816913 in words is "seven million, eight hundred sixteen thousand, nine hundred thirteen".