3879749 has 2 divisors, whose sum is σ = 3879750. Its totient is φ = 3879748.

The previous prime is 3879739. The next prime is 3879751. The reversal of 3879749 is 9479783.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2829124 + 1050625 = 1682^2 + 1025^2 .

It is an emirp because it is prime and its reverse (9479783) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3879749 - 2¹² = 3875653 is a prime.

Together with 3879751, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3879719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1939874 + 1939875.

It is an arithmetic number, because the mean of its divisors is an integer number (1939875).

Almost surely, 2^3879749 is an apocalyptic number.

It is an amenable number.

3879749 is a deficient number, since it is larger than the sum of its proper divisors (1).

3879749 is an equidigital number, since it uses as much as digits as its factorization.

3879749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 381024, while the sum is 47.

The square root of 3879749 is about 1969.7078463569. The cubic root of 3879749 is about 157.1331716581.

The spelling of 3879749 in words is "three million, eight hundred seventy-nine thousand, seven hundred forty-nine".