64535129 has 4 divisors (see below), whose sum is σ = 64698084. Its totient is φ = 64372176.

The previous prime is 64535113. The next prime is 64535161. The reversal of 64535129 is 92153546.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92153546 = 2 ⋅46076773.

It can be written as a sum of positive squares in 2 ways, for example, as 45630025 + 18905104 = 6755^2 + 4348^2 .

It is a cyclic number.

It is not a de Polignac number, because 64535129 - 2⁴ = 64535113 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64535329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80882 + ... + 81675.

It is an arithmetic number, because the mean of its divisors is an integer number (16174521).

Almost surely, 2^64535129 is an apocalyptic number.

It is an amenable number.

64535129 is a deficient number, since it is larger than the sum of its proper divisors (162955).

64535129 is a wasteful number, since it uses less digits than its factorization.

64535129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162954.

The product of its digits is 32400, while the sum is 35.

The square root of 64535129 is about 8033.3759404126. The cubic root of 64535129 is about 401.1117591992. Note that the first 3 decimals are identical.

The spelling of 64535129 in words is "sixty-four million, five hundred thirty-five thousand, one hundred twenty-nine".