64040033 has 4 divisors (see below), whose sum is σ = 66248340. Its totient is φ = 61831728.

The previous prime is 64040021. The next prime is 64040047. The reversal of 64040033 is 33004046.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33004046 = 2 ⋅16502023.

It can be written as a sum of positive squares in 2 ways, for example, as 54937744 + 9102289 = 7412^2 + 3017^2 .

It is a cyclic number.

It is not a de Polignac number, because 64040033 - 2⁸ = 64039777 is a prime.

It is a super-2 number, since 2×64040033² = 8202251653282178, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64039987 and 64040014.

It is not an unprimeable number, because it can be changed into a prime (64040063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1104110 + ... + 1104167.

It is an arithmetic number, because the mean of its divisors is an integer number (16562085).

Almost surely, 2^64040033 is an apocalyptic number.

It is an amenable number.

64040033 is a deficient number, since it is larger than the sum of its proper divisors (2208307).

64040033 is a wasteful number, since it uses less digits than its factorization.

64040033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2208306.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 64040033 is about 8002.5016713525. The cubic root of 64040033 is about 400.0833846996.

Adding to 64040033 its reverse (33004046), we get a palindrome (97044079).

The spelling of 64040033 in words is "sixty-four million, forty thousand, thirty-three".