3923813 has 8 divisors (see below), whose sum is σ = 4059768. Its totient is φ = 3789504.

The previous prime is 3923791. The next prime is 3923827. The reversal of 3923813 is 3183293.

It can be written as a sum of positive squares in 4 ways, for example, as 889249 + 3034564 = 943^2 + 1742^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3923813 - 2¹² = 3919717 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 (3923863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6095 + ... + 6707.

It is an arithmetic number, because the mean of its divisors is an integer number (507471).

Almost surely, 2^3923813 is an apocalyptic number.

It is an amenable number.

3923813 is a deficient number, since it is larger than the sum of its proper divisors (135955).

3923813 is a wasteful number, since it uses less digits than its factorization.

3923813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823.

The product of its digits is 3888, while the sum is 29.

The square root of 3923813 is about 1980.8616811883. The cubic root of 3923813 is about 157.7258103042.

The spelling of 3923813 in words is "three million, nine hundred twenty-three thousand, eight hundred thirteen".