3979749 has 8 divisors (see below), whose sum is σ = 5477632. Its totient is φ = 2567520.

The previous prime is 3979739. The next prime is 3979771. The reversal of 3979749 is 9479793.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3979749 - 2⁹ = 3979237 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a zygodrome in base 6.

It is a junction number, because it is equal to n+sod(n) for n = 3979698 and 3979707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3979739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21304 + ... + 21489.

It is an arithmetic number, because the mean of its divisors is an integer number (684704).

Almost surely, 2^3979749 is an apocalyptic number.

It is an amenable number.

3979749 is a deficient number, since it is larger than the sum of its proper divisors (1497883).

3979749 is a wasteful number, since it uses less digits than its factorization.

3979749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42827.

The product of its digits is 428652, while the sum is 48.

The square root of 3979749 is about 1994.9308258684. The cubic root of 3979749 is about 158.4717646832.

The spelling of 3979749 in words is "three million, nine hundred seventy-nine thousand, seven hundred forty-nine".