65713891 has 4 divisors (see below), whose sum is σ = 69579432. Its totient is φ = 61848352.

The previous prime is 65713889. The next prime is 65713909. The reversal of 65713891 is 19831756.

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

It is a cyclic number.

It is not a de Polignac number, because 65713891 - 2¹ = 65713889 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 not an unprimeable number, because it can be changed into a prime (65713091) 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, 1932745 + ... + 1932778.

It is an arithmetic number, because the mean of its divisors is an integer number (17394858).

Almost surely, 2^65713891 is an apocalyptic number.

65713891 is a deficient number, since it is larger than the sum of its proper divisors (3865541).

65713891 is a wasteful number, since it uses less digits than its factorization.

65713891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3865540.

The product of its digits is 45360, while the sum is 40.

The square root of 65713891 is about 8106.4104880027. The cubic root of 65713891 is about 403.5391990671.

The spelling of 65713891 in words is "sixty-five million, seven hundred thirteen thousand, eight hundred ninety-one".