64249999 has 4 divisors (see below), whose sum is σ = 70090920. Its totient is φ = 58409080.

The previous prime is 64249981. The next prime is 64250009. The reversal of 64249999 is 99994246.

64249999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64249999 - 2¹¹ = 64247951 is a prime.

It is a Duffinian number.

64249999 is a modest number, since divided by 9999 gives 6424 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64249909) 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 3 ways as a sum of consecutive naturals, for example, 2920444 + ... + 2920465.

It is an arithmetic number, because the mean of its divisors is an integer number (17522730).

Almost surely, 2^64249999 is an apocalyptic number.

64249999 is a deficient number, since it is larger than the sum of its proper divisors (5840921).

64249999 is a wasteful number, since it uses less digits than its factorization.

64249999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5840920.

The product of its digits is 1259712, while the sum is 52.

The square root of 64249999 is about 8015.6097085624. The cubic root of 64249999 is about 400.5201545549.

The spelling of 64249999 in words is "sixty-four million, two hundred forty-nine thousand, nine hundred ninety-nine".