65947793 has 2 divisors, whose sum is σ = 65947794. Its totient is φ = 65947792.

The previous prime is 65947789. The next prime is 65947837. The reversal of 65947793 is 39774956.

65947793 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35664784 + 30283009 = 5972^2 + 5503^2 .

It is a cyclic number.

It is not a de Polignac number, because 65947793 - 2² = 65947789 is a prime.

It is a super-2 number, since 2×65947793² = 8698222803141698, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (65947723) 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 as a sum of consecutive naturals, namely, 32973896 + 32973897.

It is an arithmetic number, because the mean of its divisors is an integer number (32973897).

Almost surely, 2^65947793 is an apocalyptic number.

It is an amenable number.

65947793 is a deficient number, since it is larger than the sum of its proper divisors (1).

65947793 is an equidigital number, since it uses as much as digits as its factorization.

65947793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1428840, while the sum is 50.

The square root of 65947793 is about 8120.8246502433. The cubic root of 65947793 is about 404.0174178845.

The spelling of 65947793 in words is "sixty-five million, nine hundred forty-seven thousand, seven hundred ninety-three".