65831994 has 16 divisors (see below), whose sum is σ = 146293440. Its totient is φ = 21943980.

The previous prime is 65831977. The next prime is 65831999. The reversal of 65831994 is 49913856.

It is a happy number.

65831994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (65831999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 609502 + ... + 609609.

It is an arithmetic number, because the mean of its divisors is an integer number (9143340).

Almost surely, 2^65831994 is an apocalyptic number.

65831994 is an abundant number, since it is smaller than the sum of its proper divisors (80461446).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65831994 is a wasteful number, since it uses less digits than its factorization.

65831994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1219122 (or 1219116 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 65831994 is about 8113.6917614610. The cubic root of 65831994 is about 403.7808053508.

It can be divided in two parts, 6 and 5831994, that added together give a cube (5832000 = 180³).

The spelling of 65831994 in words is "sixty-five million, eight hundred thirty-one thousand, nine hundred ninety-four".