640003105 has 16 divisors (see below), whose sum is σ = 878154624. Its totient is φ = 438641280.

The previous prime is 640003093. The next prime is 640003141. The reversal of 640003105 is 501300046.

It is not a de Polignac number, because 640003105 - 2¹³ = 639994913 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102349 + ... + 108421.

It is an arithmetic number, because the mean of its divisors is an integer number (54884664).

Almost surely, 2^640003105 is an apocalyptic number.

It is an amenable number.

640003105 is a deficient number, since it is larger than the sum of its proper divisors (238151519).

640003105 is a wasteful number, since it uses less digits than its factorization.

640003105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9096.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 640003105 is about 25298.2826492234. The cubic root of 640003105 is about 861.7752696604.

The spelling of 640003105 in words is "six hundred forty million, three thousand, one hundred five".