3778013 has 4 divisors (see below), whose sum is σ = 3799068. Its totient is φ = 3756960.

The previous prime is 3778007. The next prime is 3778039. The reversal of 3778013 is 3108773.

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 458329 + 3319684 = 677^2 + 1822^2 .

It is a cyclic number.

It is not a de Polignac number, because 3778013 - 2⁴ = 3777997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3778043) 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, 10256 + ... + 10617.

It is an arithmetic number, because the mean of its divisors is an integer number (949767).

Almost surely, 2^3778013 is an apocalyptic number.

It is an amenable number.

3778013 is a deficient number, since it is larger than the sum of its proper divisors (21055).

3778013 is a wasteful number, since it uses less digits than its factorization.

3778013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21054.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 3778013 is about 1943.7111410907. The cubic root of 3778013 is about 155.7475233356.

The spelling of 3778013 in words is "three million, seven hundred seventy-eight thousand, thirteen".