3806513 has 4 divisors (see below), whose sum is σ = 3878388. Its totient is φ = 3734640.

The previous prime is 3806507. The next prime is 3806527. The reversal of 3806513 is 3156083.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 906304 + 2900209 = 952^2 + 1703^2 .

It is a cyclic number.

It is not a de Polignac number, because 3806513 - 2¹⁰ = 3805489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3808513) 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, 35858 + ... + 35963.

It is an arithmetic number, because the mean of its divisors is an integer number (969597).

Almost surely, 2^3806513 is an apocalyptic number.

It is an amenable number.

3806513 is a deficient number, since it is larger than the sum of its proper divisors (71875).

3806513 is an equidigital number, since it uses as much as digits as its factorization.

3806513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71874.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 3806513 is about 1951.0287030180. The cubic root of 3806513 is about 156.1381774851.

The spelling of 3806513 in words is "three million, eight hundred six thousand, five hundred thirteen".