64399005 has 24 divisors (see below), whose sum is σ = 121773600. Its totient is φ = 31223520.

The previous prime is 64399003. The next prime is 64399007. The reversal of 64399005 is 50099346.

64399005 is a `hidden beast` number, since 643 + 9 + 9 + 0 + 0 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (64399003) and next prime (64399007).

It is not a de Polignac number, because 64399005 - 2¹ = 64399003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64399003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64555 + ... + 65544.

It is an arithmetic number, because the mean of its divisors is an integer number (5073900).

Almost surely, 2^64399005 is an apocalyptic number.

It is an amenable number.

64399005 is a deficient number, since it is larger than the sum of its proper divisors (57374595).

64399005 is a wasteful number, since it uses less digits than its factorization.

64399005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130121 (or 130118 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 64399005 is about 8024.8990647858. The cubic root of 64399005 is about 400.8295388905.

The spelling of 64399005 in words is "sixty-four million, three hundred ninety-nine thousand, five".