3889739 has 4 divisors (see below), whose sum is σ = 4445424. Its totient is φ = 3334056.

The previous prime is 3889733. The next prime is 3889759. The reversal of 3889739 is 9379883.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9379883 = 23 ⋅407821.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3889739 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3889693 and 3889702.

It is not an unprimeable number, because it can be changed into a prime (3889733) 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 in 3 ways as a sum of consecutive naturals, for example, 277832 + ... + 277845.

It is an arithmetic number, because the mean of its divisors is an integer number (1111356).

Almost surely, 2^3889739 is an apocalyptic number.

3889739 is a deficient number, since it is larger than the sum of its proper divisors (555685).

3889739 is an equidigital number, since it uses as much as digits as its factorization.

3889739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555684.

The product of its digits is 326592, while the sum is 47.

The square root of 3889739 is about 1972.2421250952. The cubic root of 3889739 is about 157.2679239302.

The spelling of 3889739 in words is "three million, eight hundred eighty-nine thousand, seven hundred thirty-nine".