3902813 has 2 divisors, whose sum is σ = 3902814. Its totient is φ = 3902812.

The previous prime is 3902803. The next prime is 3902819. The reversal of 3902813 is 3182093.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2896804 + 1006009 = 1702^2 + 1003^2 .

It is an emirp because it is prime and its reverse (3182093) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3902813 - 2⁸ = 3902557 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3902819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1951406 + 1951407.

It is an arithmetic number, because the mean of its divisors is an integer number (1951407).

Almost surely, 2^3902813 is an apocalyptic number.

It is an amenable number.

3902813 is a deficient number, since it is larger than the sum of its proper divisors (1).

3902813 is an equidigital number, since it uses as much as digits as its factorization.

3902813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 3902813 is about 1975.5538463935. The cubic root of 3902813 is about 157.4439272974.

The spelling of 3902813 in words is "three million, nine hundred two thousand, eight hundred thirteen".