64309005 has 16 divisors (see below), whose sum is σ = 114327360. Its totient is φ = 34298064.

The previous prime is 64309001. The next prime is 64309051. The reversal of 64309005 is 50090346.

It is a happy number.

It is not a de Polignac number, because 64309005 - 2² = 64309001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 64309005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64309001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 238047 + ... + 238316.

It is an arithmetic number, because the mean of its divisors is an integer number (7145460).

Almost surely, 2^64309005 is an apocalyptic number.

It is an amenable number.

64309005 is a deficient number, since it is larger than the sum of its proper divisors (50018355).

64309005 is a wasteful number, since it uses less digits than its factorization.

64309005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476377 (or 476371 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 64309005 is about 8019.2895570618. The cubic root of 64309005 is about 400.6427271182.

The spelling of 64309005 in words is "sixty-four million, three hundred nine thousand, five".