65729894 has 8 divisors (see below), whose sum is σ = 100266120. Its totient is φ = 32307856.

The previous prime is 65729887. The next prime is 65729897. The reversal of 65729894 is 49892756.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65729897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278399 + ... + 278634.

It is an arithmetic number, because the mean of its divisors is an integer number (12533265).

Almost surely, 2^65729894 is an apocalyptic number.

65729894 is a deficient number, since it is larger than the sum of its proper divisors (34536226).

65729894 is a wasteful number, since it uses less digits than its factorization.

65729894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557094.

The product of its digits is 1088640, while the sum is 50.

The square root of 65729894 is about 8107.3974862467. The cubic root of 65729894 is about 403.5719537534.

The spelling of 65729894 in words is "sixty-five million, seven hundred twenty-nine thousand, eight hundred ninety-four".