3786813 has 6 divisors (see below), whose sum is σ = 5469854. Its totient is φ = 2524536.

The previous prime is 3786803. The next prime is 3786821. The reversal of 3786813 is 3186873.

It can be written as a sum of positive squares in only one way, i.e., 1996569 + 1790244 = 1413^2 + 1338^2 .

It is not a de Polignac number, because 3786813 - 2⁵ = 3786781 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 (3786803) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 210370 + ... + 210387.

Almost surely, 2^3786813 is an apocalyptic number.

It is an amenable number.

3786813 is a deficient number, since it is larger than the sum of its proper divisors (1683041).

3786813 is a wasteful number, since it uses less digits than its factorization.

3786813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420763 (or 420760 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 3786813 is about 1945.9735352774. The cubic root of 3786813 is about 155.8683554090.

The spelling of 3786813 in words is "three million, seven hundred eighty-six thousand, eight hundred thirteen".