64935509 has 4 divisors (see below), whose sum is σ = 67758816. Its totient is φ = 62112204.

The previous prime is 64935503. The next prime is 64935511. The reversal of 64935509 is 90553946.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 64935509 - 2⁸ = 64935253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64935503) 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, 1411619 + ... + 1411664.

It is an arithmetic number, because the mean of its divisors is an integer number (16939704).

Almost surely, 2^64935509 is an apocalyptic number.

It is an amenable number.

64935509 is a deficient number, since it is larger than the sum of its proper divisors (2823307).

64935509 is a wasteful number, since it uses less digits than its factorization.

64935509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2823306.

The product of its (nonzero) digits is 145800, while the sum is 41.

The square root of 64935509 is about 8058.2571937113. The cubic root of 64935509 is about 401.9395571774.

The spelling of 64935509 in words is "sixty-four million, nine hundred thirty-five thousand, five hundred nine".