4000799987 has 2 divisors, whose sum is σ = 4000799988. Its totient is φ = 4000799986.

The previous prime is 4000799969. The next prime is 4000799989. The reversal of 4000799987 is 7899970004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4000799987 - 2¹⁸ = 4000537843 is a prime.

Together with 4000799989, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4000799989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2000399993 + 2000399994.

It is an arithmetic number, because the mean of its divisors is an integer number (2000399994).

Almost surely, 2^4000799987 is an apocalyptic number.

4000799987 is a deficient number, since it is larger than the sum of its proper divisors (1).

4000799987 is an equidigital number, since it uses as much as digits as its factorization.

4000799987 is an evil number, because the sum of its binary digits is even.

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

The square root of 4000799987 is about 63251.8773397280. The cubic root of 4000799987 is about 1587.5068699312.

The spelling of 4000799987 in words is "four billion, seven hundred ninety-nine thousand, nine hundred eighty-seven".