3979849 has 2 divisors, whose sum is σ = 3979850. Its totient is φ = 3979848.

The previous prime is 3979837. The next prime is 3979861. The reversal of 3979849 is 9489793.

It is a balanced prime because it is at equal distance from previous prime (3979837) and next prime (3979861).

It can be written as a sum of positive squares in only one way, i.e., 2839225 + 1140624 = 1685^2 + 1068^2 .

It is an emirp because it is prime and its reverse (9489793) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3979849 - 2¹⁹ = 3455561 is a prime.

It is not a weakly prime, because it can be changed into another prime (3979889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1989924 + 1989925.

It is an arithmetic number, because the mean of its divisors is an integer number (1989925).

Almost surely, 2^3979849 is an apocalyptic number.

It is an amenable number.

3979849 is a deficient number, since it is larger than the sum of its proper divisors (1).

3979849 is an equidigital number, since it uses as much as digits as its factorization.

3979849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 49.

The square root of 3979849 is about 1994.9558892367. The cubic root of 3979849 is about 158.4730919900.

The spelling of 3979849 in words is "three million, nine hundred seventy-nine thousand, eight hundred forty-nine".