64868129 has 2 divisors, whose sum is σ = 64868130. Its totient is φ = 64868128.

The previous prime is 64868117. The next prime is 64868173. The reversal of 64868129 is 92186846.

It is a happy number.

It is an a-pointer prime, because the next prime (64868173) can be obtained adding 64868129 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52896529 + 11971600 = 7273^2 + 3460^2 .

It is a cyclic number.

It is not a de Polignac number, because 64868129 - 2⁴ = 64868113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64868129.

It is not a weakly prime, because it can be changed into another prime (64868729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32434064 + 32434065.

It is an arithmetic number, because the mean of its divisors is an integer number (32434065).

Almost surely, 2^64868129 is an apocalyptic number.

It is an amenable number.

64868129 is a deficient number, since it is larger than the sum of its proper divisors (1).

64868129 is an equidigital number, since it uses as much as digits as its factorization.

64868129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 44.

The square root of 64868129 is about 8054.0753038446. The cubic root of 64868129 is about 401.8004855529.

The spelling of 64868129 in words is "sixty-four million, eight hundred sixty-eight thousand, one hundred twenty-nine".