3680813 has 4 divisors (see below), whose sum is σ = 3874560. Its totient is φ = 3487068.

The previous prime is 3680791. The next prime is 3680837. The reversal of 3680813 is 3180863.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3180863 = 7 ⋅454409.

It is a cyclic number.

It is not a de Polignac number, because 3680813 - 2¹⁰ = 3679789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3680863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96845 + ... + 96882.

It is an arithmetic number, because the mean of its divisors is an integer number (968640).

Almost surely, 2^3680813 is an apocalyptic number.

It is an amenable number.

3680813 is a deficient number, since it is larger than the sum of its proper divisors (193747).

3680813 is a wasteful number, since it uses less digits than its factorization.

3680813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193746.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 3680813 is about 1918.5445003961. The cubic root of 3680813 is about 154.4002211466.

The spelling of 3680813 in words is "three million, six hundred eighty thousand, eight hundred thirteen".