3900813 has 8 divisors (see below), whose sum is σ = 5944128. Its totient is φ = 2229024.

The previous prime is 3900779. The next prime is 3900817. The reversal of 3900813 is 3180093.

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

It is not a de Polignac number, because 3900813 - 2⁶ = 3900749 is a prime.

3900813 is a modest number, since divided by 813 gives 39 as remainder.

It is a Curzon number.

3900813 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3900817) 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, 92856 + ... + 92897.

It is an arithmetic number, because the mean of its divisors is an integer number (743016).

Almost surely, 2^3900813 is an apocalyptic number.

It is an amenable number.

3900813 is a deficient number, since it is larger than the sum of its proper divisors (2043315).

3900813 is a wasteful number, since it uses less digits than its factorization.

3900813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185763.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 3900813 is about 1975.0475943632. The cubic root of 3900813 is about 157.4170286085.

The spelling of 3900813 in words is "three million, nine hundred thousand, eight hundred thirteen".