64263309 has 16 divisors (see below), whose sum is σ = 93609984. Its totient is φ = 38890800.

The previous prime is 64263299. The next prime is 64263313. The reversal of 64263309 is 90336246.

64263309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64263309 - 2⁹ = 64262797 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 64263309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64263209) 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 in 15 ways as a sum of consecutive naturals, for example, 37812 + ... + 39474.

It is an arithmetic number, because the mean of its divisors is an integer number (5850624).

Almost surely, 2^64263309 is an apocalyptic number.

It is an amenable number.

64263309 is a deficient number, since it is larger than the sum of its proper divisors (29346675).

64263309 is a wasteful number, since it uses less digits than its factorization.

64263309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2848.

The product of its (nonzero) digits is 23328, while the sum is 33.

The square root of 64263309 is about 8016.4399205632. The cubic root of 64263309 is about 400.5478098351.

The spelling of 64263309 in words is "sixty-four million, two hundred sixty-three thousand, three hundred nine".