3889993 has 2 divisors, whose sum is σ = 3889994. Its totient is φ = 3889992.

The previous prime is 3889969. The next prime is 3890011. The reversal of 3889993 is 3999883.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2913849 + 976144 = 1707^2 + 988^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3889993 is a prime.

It is not a weakly prime, because it can be changed into another prime (3889913) 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, 1944996 + 1944997.

It is an arithmetic number, because the mean of its divisors is an integer number (1944997).

Almost surely, 2^3889993 is an apocalyptic number.

It is an amenable number.

3889993 is a deficient number, since it is larger than the sum of its proper divisors (1).

3889993 is an equidigital number, since it uses as much as digits as its factorization.

3889993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 419904, while the sum is 49.

The square root of 3889993 is about 1972.3065177604. The cubic root of 3889993 is about 157.2713470547.

The spelling of 3889993 in words is "three million, eight hundred eighty-nine thousand, nine hundred ninety-three".