3901813 has 4 divisors (see below), whose sum is σ = 3907008. Its totient is φ = 3896620.

The previous prime is 3901801. The next prime is 3901819. The reversal of 3901813 is 3181093.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3901813 - 2⁹ = 3901301 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 (3901819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1231 + ... + 3052.

It is an arithmetic number, because the mean of its divisors is an integer number (976752).

Almost surely, 2^3901813 is an apocalyptic number.

It is an amenable number.

3901813 is a deficient number, since it is larger than the sum of its proper divisors (5195).

3901813 is an equidigital number, since it uses as much as digits as its factorization.

3901813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5194.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 3901813 is about 1975.3007365968. The cubic root of 3901813 is about 157.4304791020.

The spelling of 3901813 in words is "three million, nine hundred one thousand, eight hundred thirteen".