4000783979 has 2 divisors, whose sum is σ = 4000783980. Its totient is φ = 4000783978.

The previous prime is 4000783949. The next prime is 4000783993. The reversal of 4000783979 is 9793870004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4000783979 - 2²⁰ = 3999735403 is a prime.

It is not a weakly prime, because it can be changed into another prime (4000783939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2000391989 + 2000391990.

It is an arithmetic number, because the mean of its divisors is an integer number (2000391990).

Almost surely, 2^4000783979 is an apocalyptic number.

4000783979 is a deficient number, since it is larger than the sum of its proper divisors (1).

4000783979 is an equidigital number, since it uses as much as digits as its factorization.

4000783979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 4000783979 is about 63251.7507979028. The cubic root of 4000783979 is about 1587.5047526177.

The spelling of 4000783979 in words is "four billion, seven hundred eighty-three thousand, nine hundred seventy-nine".