3946739 has 2 divisors, whose sum is σ = 3946740. Its totient is φ = 3946738.

The previous prime is 3946729. The next prime is 3946741. The reversal of 3946739 is 9376493.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3946739 - 2⁸ = 3946483 is a prime.

Together with 3946741, it forms a pair of twin primes.

It is a Chen prime.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 3946696 and 3946705.

It is not a weakly prime, because it can be changed into another prime (3946729) 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 as a sum of consecutive naturals, namely, 1973369 + 1973370.

It is an arithmetic number, because the mean of its divisors is an integer number (1973370).

Almost surely, 2^3946739 is an apocalyptic number.

3946739 is a deficient number, since it is larger than the sum of its proper divisors (1).

3946739 is an equidigital number, since it uses as much as digits as its factorization.

3946739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472, while the sum is 41.

The square root of 3946739 is about 1986.6401284581. The cubic root of 3946739 is about 158.0324000211.

The spelling of 3946739 in words is "three million, nine hundred forty-six thousand, seven hundred thirty-nine".