3999733 has 2 divisors, whose sum is σ = 3999734. Its totient is φ = 3999732.

The previous prime is 3999727. The next prime is 3999739. The reversal of 3999733 is 3379993.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (3999727) and next prime (3999739).

It can be written as a sum of positive squares in only one way, i.e., 3908529 + 91204 = 1977^2 + 302^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3999733 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3999733.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3999739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1999866 + 1999867.

It is an arithmetic number, because the mean of its divisors is an integer number (1999867).

Almost surely, 2^3999733 is an apocalyptic number.

It is an amenable number.

3999733 is a deficient number, since it is larger than the sum of its proper divisors (1).

3999733 is an equidigital number, since it uses as much as digits as its factorization.

3999733 is an evil number, because the sum of its binary digits is even.

The product of its digits is 137781, while the sum is 43.

The square root of 3999733 is about 1999.9332488861. The cubic root of 3999733 is about 158.7365731509.

The spelling of 3999733 in words is "three million, nine hundred ninety-nine thousand, seven hundred thirty-three".