7979849 has 4 divisors (see below), whose sum is σ = 8089236. Its totient is φ = 7870464.

The previous prime is 7979833. The next prime is 7979857. The reversal of 7979849 is 9489797.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2050624 + 5929225 = 1432^2 + 2435^2 .

It is a cyclic number.

It is not a de Polignac number, because 7979849 - 2⁴ = 7979833 is a prime.

It is a d-powerful number, because it can be written as 7⁶ + 9² + 7⁸ + 9² + 8⁷ + 4 + 9² .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7979849.

It is not an unprimeable number, because it can be changed into a prime (7979819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54584 + ... + 54729.

It is an arithmetic number, because the mean of its divisors is an integer number (2022309).

Almost surely, 2^7979849 is an apocalyptic number.

It is an amenable number.

7979849 is a deficient number, since it is larger than the sum of its proper divisors (109387).

7979849 is a wasteful number, since it uses less digits than its factorization.

7979849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109386.

The product of its digits is 1143072, while the sum is 53.

The square root of 7979849 is about 2824.8626515284. The cubic root of 7979849 is about 199.8319338083.

The spelling of 7979849 in words is "seven million, nine hundred seventy-nine thousand, eight hundred forty-nine".