4020987279 has 4 divisors (see below), whose sum is σ = 5361316376. Its totient is φ = 2680658184.

The previous prime is 4020987263. The next prime is 4020987317. The reversal of 4020987279 is 9727890204.

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

It is not a de Polignac number, because 4020987279 - 2⁴ = 4020987263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4020987209) 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, 670164544 + ... + 670164549.

It is an arithmetic number, because the mean of its divisors is an integer number (1340329094).

Almost surely, 2^4020987279 is an apocalyptic number.

4020987279 is a deficient number, since it is larger than the sum of its proper divisors (1340329097).

4020987279 is a wasteful number, since it uses less digits than its factorization.

4020987279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340329096.

The product of its (nonzero) digits is 508032, while the sum is 48.

The square root of 4020987279 is about 63411.2551444931. The cubic root of 4020987279 is about 1590.1724796080.

The spelling of 4020987279 in words is "four billion, twenty million, nine hundred eighty-seven thousand, two hundred seventy-nine".