4639891979 has 8 divisors (see below), whose sum is σ = 4942943040. Its totient is φ = 4342725576.

The previous prime is 4639891967. The next prime is 4639891981. The reversal of 4639891979 is 9791989364.

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

It is not a de Polignac number, because 4639891979 - 2¹² = 4639887883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4639891579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1469537 + ... + 1472690.

It is an arithmetic number, because the mean of its divisors is an integer number (617867880).

Almost surely, 2^4639891979 is an apocalyptic number.

4639891979 is a deficient number, since it is larger than the sum of its proper divisors (303051061).

4639891979 is a wasteful number, since it uses less digits than its factorization.

4639891979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2942329.

The product of its digits is 26453952, while the sum is 65.

The square root of 4639891979 is about 68116.7525576491. The cubic root of 4639891979 is about 1667.8972397814.

The spelling of 4639891979 in words is "four billion, six hundred thirty-nine million, eight hundred ninety-one thousand, nine hundred seventy-nine".