863388387 has 6 divisors (see below), whose sum is σ = 1247116572. Its totient is φ = 575592252.

The previous prime is 863388341. The next prime is 863388389. The reversal of 863388387 is 783883368.

It is a happy number.

It is not a de Polignac number, because 863388387 - 2⁷ = 863388259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (863388389) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 47966013 + ... + 47966030.

It is an arithmetic number, because the mean of its divisors is an integer number (207852762).

Almost surely, 2^863388387 is an apocalyptic number.

863388387 is a deficient number, since it is larger than the sum of its proper divisors (383728185).

863388387 is a wasteful number, since it uses less digits than its factorization.

863388387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95932049 (or 95932046 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 54.

The square root of 863388387 is about 29383.4713231776. The cubic root of 863388387 is about 952.2158385191.

It can be divided in two parts, 8633 and 88387, that added together give a triangular number (97020 = T₄₄₀).

The spelling of 863388387 in words is "eight hundred sixty-three million, three hundred eighty-eight thousand, three hundred eighty-seven".