3900943 has 2 divisors, whose sum is σ = 3900944. Its totient is φ = 3900942.

The previous prime is 3900937. The next prime is 3900989. The reversal of 3900943 is 3490093.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3900943 - 2¹³ = 3892751 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3900343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1950471 + 1950472.

It is an arithmetic number, because the mean of its divisors is an integer number (1950472).

Almost surely, 2^3900943 is an apocalyptic number.

3900943 is a deficient number, since it is larger than the sum of its proper divisors (1).

3900943 is an equidigital number, since it uses as much as digits as its factorization.

3900943 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 3900943 is about 1975.0805046884. The cubic root of 3900943 is about 157.4187773027.

The spelling of 3900943 in words is "three million, nine hundred thousand, nine hundred forty-three".