3899639 has 2 divisors, whose sum is σ = 3899640. Its totient is φ = 3899638.

The previous prime is 3899611. The next prime is 3899653. The reversal of 3899639 is 9369983.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3899639 - 2⁸ = 3899383 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 3899593 and 3899602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3899699) 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, 1949819 + 1949820.

It is an arithmetic number, because the mean of its divisors is an integer number (1949820).

Almost surely, 2^3899639 is an apocalyptic number.

3899639 is a deficient number, since it is larger than the sum of its proper divisors (1).

3899639 is an equidigital number, since it uses as much as digits as its factorization.

3899639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 314928, while the sum is 47.

The square root of 3899639 is about 1974.7503639701. The cubic root of 3899639 is about 157.4012347954.

The spelling of 3899639 in words is "three million, eight hundred ninety-nine thousand, six hundred thirty-nine".