64819935 has 12 divisors (see below), whose sum is σ = 112354632. Its totient is φ = 34570608.

The previous prime is 64819933. The next prime is 64819961. The reversal of 64819935 is 53991846.

It is a happy number.

It is not a de Polignac number, because 64819935 - 2¹ = 64819933 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1440443 = 64819935 / (6 + 4 + 8 + 1 + 9 + 9 + 3 + 5).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64819933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 720177 + ... + 720266.

It is an arithmetic number, because the mean of its divisors is an integer number (9362886).

Almost surely, 2^64819935 is an apocalyptic number.

64819935 is a deficient number, since it is larger than the sum of its proper divisors (47534697).

64819935 is a wasteful number, since it uses less digits than its factorization.

64819935 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1440454 (or 1440451 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 64819935 is about 8051.0828464251. The cubic root of 64819935 is about 401.7009545481.

The spelling of 64819935 in words is "sixty-four million, eight hundred nineteen thousand, nine hundred thirty-five".