3791813 has 4 divisors (see below), whose sum is σ = 3797580. Its totient is φ = 3786048.

The previous prime is 3791807. The next prime is 3791831. The reversal of 3791813 is 3181973.

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 2067844 + 1723969 = 1438^2 + 1313^2 .

It is a cyclic number.

It is not a de Polignac number, because 3791813 - 2¹⁰ = 3790789 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3791813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3791863) 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, 1748 + ... + 3261.

It is an arithmetic number, because the mean of its divisors is an integer number (949395).

Almost surely, 2^3791813 is an apocalyptic number.

It is an amenable number.

3791813 is a deficient number, since it is larger than the sum of its proper divisors (5767).

3791813 is an equidigital number, since it uses as much as digits as its factorization.

3791813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5766.

The product of its digits is 4536, while the sum is 32.

The square root of 3791813 is about 1947.2578154934. The cubic root of 3791813 is about 155.9369266167.

The spelling of 3791813 in words is "three million, seven hundred ninety-one thousand, eight hundred thirteen".