640532003 has 8 divisors (see below), whose sum is σ = 649825968. Its totient is φ = 631252224.

The previous prime is 640531987. The next prime is 640532017. The reversal of 640532003 is 300235046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 640532003 - 2⁴ = 640531987 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 640532003.

It is not an unprimeable number, because it can be changed into a prime (640532023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116075 + ... + 121467.

It is an arithmetic number, because the mean of its divisors is an integer number (81228246).

Almost surely, 2^640532003 is an apocalyptic number.

640532003 is a deficient number, since it is larger than the sum of its proper divisors (9293965).

640532003 is a wasteful number, since it uses less digits than its factorization.

640532003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7093.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 640532003 is about 25308.7337296831. The cubic root of 640532003 is about 862.0125944044.

Adding to 640532003 its reverse (300235046), we get a palindrome (940767049).

The spelling of 640532003 in words is "six hundred forty million, five hundred thirty-two thousand, three".