64033813 has 4 divisors (see below), whose sum is σ = 64265260. Its totient is φ = 63802368.

The previous prime is 64033811. The next prime is 64033831. The reversal of 64033813 is 31833046.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7828804 + 56205009 = 2798^2 + 7497^2 .

It is a cyclic number.

It is not a de Polignac number, because 64033813 - 2¹ = 64033811 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64033811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115308 + ... + 115861.

It is an arithmetic number, because the mean of its divisors is an integer number (16066315).

Almost surely, 2^64033813 is an apocalyptic number.

It is an amenable number.

64033813 is a deficient number, since it is larger than the sum of its proper divisors (231447).

64033813 is a wasteful number, since it uses less digits than its factorization.

64033813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231446.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 64033813 is about 8002.1130334431. The cubic root of 64033813 is about 400.0704313478.

Adding to 64033813 its reverse (31833046), we get a palindrome (95866859).

It can be divided in two parts, 64033 and 813, that added together give a palindrome (64846).

The spelling of 64033813 in words is "sixty-four million, thirty-three thousand, eight hundred thirteen".