640233059 has 4 divisors (see below), whose sum is σ = 643809960. Its totient is φ = 636656160.

The previous prime is 640233031. The next prime is 640233071. The reversal of 640233059 is 950332046.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 950332046 = 2 ⋅475166023.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-640233059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (640233259) 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, 1788182 + ... + 1788539.

It is an arithmetic number, because the mean of its divisors is an integer number (160952490).

Almost surely, 2^640233059 is an apocalyptic number.

640233059 is a deficient number, since it is larger than the sum of its proper divisors (3576901).

640233059 is a wasteful number, since it uses less digits than its factorization.

640233059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3576900.

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

The square root of 640233059 is about 25302.8270950105. The cubic root of 640233059 is about 861.8784696499.

The spelling of 640233059 in words is "six hundred forty million, two hundred thirty-three thousand, fifty-nine".