3946429 has 2 divisors, whose sum is σ = 3946430. Its totient is φ = 3946428.

The previous prime is 3946427. The next prime is 3946447. The reversal of 3946429 is 9246493.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3348900 + 597529 = 1830^2 + 773^2 .

It is a cyclic number.

It is not a de Polignac number, because 3946429 - 2¹ = 3946427 is a prime.

Together with 3946427, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3946421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1973214 + 1973215.

It is an arithmetic number, because the mean of its divisors is an integer number (1973215).

Almost surely, 2^3946429 is an apocalyptic number.

It is an amenable number.

3946429 is a deficient number, since it is larger than the sum of its proper divisors (1).

3946429 is an equidigital number, since it uses as much as digits as its factorization.

3946429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 37.

The square root of 3946429 is about 1986.5621057495. The cubic root of 3946429 is about 158.0282623159.

It can be divided in two parts, 39464 and 29, that added together give a palindrome (39493).

The spelling of 3946429 in words is "three million, nine hundred forty-six thousand, four hundred twenty-nine".