4979391 has 4 divisors (see below), whose sum is σ = 6639192. Its totient is φ = 3319592.

The previous prime is 4979371. The next prime is 4979393. The reversal of 4979391 is 1939794.

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

It is a cyclic number.

It is not a de Polignac number, because 4979391 - 2⁷ = 4979263 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4979393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 829896 + ... + 829901.

It is an arithmetic number, because the mean of its divisors is an integer number (1659798).

Almost surely, 2^4979391 is an apocalyptic number.

4979391 is a deficient number, since it is larger than the sum of its proper divisors (1659801).

4979391 is a wasteful number, since it uses less digits than its factorization.

4979391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1659800.

The product of its digits is 61236, while the sum is 42.

The square root of 4979391 is about 2231.4549065576. The cubic root of 4979391 is about 170.7623318403.

The spelling of 4979391 in words is "four million, nine hundred seventy-nine thousand, three hundred ninety-one".