3993739 has 2 divisors, whose sum is σ = 3993740. Its totient is φ = 3993738.

The previous prime is 3993733. The next prime is 3993751. The reversal of 3993739 is 9373993.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (9373993) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3993739 is a prime.

3993739 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3993695 and 3993704.

It is not a weakly prime, because it can be changed into another prime (3993733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1996869 + 1996870.

It is an arithmetic number, because the mean of its divisors is an integer number (1996870).

Almost surely, 2^3993739 is an apocalyptic number.

3993739 is a deficient number, since it is larger than the sum of its proper divisors (1).

3993739 is an equidigital number, since it uses as much as digits as its factorization.

3993739 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 3993739 is about 1998.4341370183. The cubic root of 3993739 is about 158.6572392966.

The spelling of 3993739 in words is "three million, nine hundred ninety-three thousand, seven hundred thirty-nine".