65903863 has 4 divisors (see below), whose sum is σ = 68176440. Its totient is φ = 63631288.

The previous prime is 65903843. The next prime is 65903869. The reversal of 65903863 is 36830956.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65903863 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65903869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1136245 + ... + 1136302.

It is an arithmetic number, because the mean of its divisors is an integer number (17044110).

Almost surely, 2^65903863 is an apocalyptic number.

65903863 is a deficient number, since it is larger than the sum of its proper divisors (2272577).

65903863 is a wasteful number, since it uses less digits than its factorization.

65903863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2272576.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 65903863 is about 8118.1194250885. The cubic root of 65903863 is about 403.9276881818.

It can be divided in two parts, 65903 and 863, that added together give a palindrome (66766).

The spelling of 65903863 in words is "sixty-five million, nine hundred three thousand, eight hundred sixty-three".