64233509 has 16 divisors (see below), whose sum is σ = 69439680. Its totient is φ = 59230080.

The previous prime is 64233493. The next prime is 64233527. The reversal of 64233509 is 90533246.

It is a cyclic number.

It is not a de Polignac number, because 64233509 - 2⁴ = 64233493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64233539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 228449 + ... + 228729.

It is an arithmetic number, because the mean of its divisors is an integer number (4339980).

Almost surely, 2^64233509 is an apocalyptic number.

It is an amenable number.

64233509 is a deficient number, since it is larger than the sum of its proper divisors (5206171).

64233509 is a wasteful number, since it uses less digits than its factorization.

64233509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 64233509 is about 8014.5810246076. The cubic root of 64233509 is about 400.4858866298.

The spelling of 64233509 in words is "sixty-four million, two hundred thirty-three thousand, five hundred nine".