6423799887 has 12 divisors (see below), whose sum is σ = 9304673040. Its totient is φ = 4270602048.

The previous prime is 6423799883. The next prime is 6423799897. The reversal of 6423799887 is 7889973246.

It is not a de Polignac number, because 6423799887 - 2² = 6423799883 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6423799883) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 990858 + ... + 997319.

It is an arithmetic number, because the mean of its divisors is an integer number (775389420).

Almost surely, 2^6423799887 is an apocalyptic number.

6423799887 is a deficient number, since it is larger than the sum of its proper divisors (2880873153).

6423799887 is a wasteful number, since it uses less digits than its factorization.

6423799887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1988542 (or 1988539 counting only the distinct ones).

The product of its digits is 36578304, while the sum is 63.

The square root of 6423799887 is about 80148.6112605827. The cubic root of 6423799887 is about 1858.9341300431.

The spelling of 6423799887 in words is "six billion, four hundred twenty-three million, seven hundred ninety-nine thousand, eight hundred eighty-seven".