64043799 has 32 divisors (see below), whose sum is σ = 93388800. Its totient is φ = 38918880.

The previous prime is 64043779. The next prime is 64043821. The reversal of 64043799 is 99734046.

It is not a de Polignac number, because 64043799 - 2⁷ = 64043671 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64043799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64043719) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 168792 + ... + 169170.

It is an arithmetic number, because the mean of its divisors is an integer number (2918400).

Almost surely, 2^64043799 is an apocalyptic number.

64043799 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

64043799 is the 4278-th nonagonal number.

64043799 is a deficient number, since it is larger than the sum of its proper divisors (29345001).

64043799 is a wasteful number, since it uses less digits than its factorization.

64043799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515.

The product of its (nonzero) digits is 163296, while the sum is 42.

The square root of 64043799 is about 8002.7369693124. The cubic root of 64043799 is about 400.0912271091.

The spelling of 64043799 in words is "sixty-four million, forty-three thousand, seven hundred ninety-nine".