7700813 has 4 divisors (see below), whose sum is σ = 8153820. Its totient is φ = 7247808.

The previous prime is 7700807. The next prime is 7700831. The reversal of 7700813 is 3180077.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3180077 = 281 ⋅11317.

It can be written as a sum of positive squares in 2 ways, for example, as 6646084 + 1054729 = 2578^2 + 1027^2 .

It is a cyclic number.

It is not a de Polignac number, because 7700813 - 2⁸ = 7700557 is a prime.

It is a Duffinian number.

7700813 is a modest number, since divided by 813 gives 77 as remainder.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7700513) 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 in 3 ways as a sum of consecutive naturals, for example, 226478 + ... + 226511.

It is an arithmetic number, because the mean of its divisors is an integer number (2038455).

Almost surely, 2^7700813 is an apocalyptic number.

It is an amenable number.

7700813 is a deficient number, since it is larger than the sum of its proper divisors (453007).

7700813 is a wasteful number, since it uses less digits than its factorization.

7700813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453006.

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 7700813 is about 2775.0338736671. The cubic root of 7700813 is about 197.4750318273.

The spelling of 7700813 in words is "seven million, seven hundred thousand, eight hundred thirteen".