64168129 has 4 divisors (see below), whose sum is σ = 64184260. Its totient is φ = 64152000.

The previous prime is 64168127. The next prime is 64168151. The reversal of 64168129 is 92186146.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 25230529 + 38937600 = 5023^2 + 6240^2 .

It is a cyclic number.

It is not a de Polignac number, because 64168129 - 2¹ = 64168127 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64168121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2629 + ... + 11629.

It is an arithmetic number, because the mean of its divisors is an integer number (16046065).

Almost surely, 2^64168129 is an apocalyptic number.

It is an amenable number.

64168129 is a deficient number, since it is larger than the sum of its proper divisors (16131).

64168129 is an equidigital number, since it uses as much as digits as its factorization.

64168129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16130.

The product of its digits is 20736, while the sum is 37.

The square root of 64168129 is about 8010.5011703388. The cubic root of 64168129 is about 400.3499624764.

The spelling of 64168129 in words is "sixty-four million, one hundred sixty-eight thousand, one hundred twenty-nine".