640003127 has 4 divisors (see below), whose sum is σ = 644298600. Its totient is φ = 635707656.

The previous prime is 640003093. The next prime is 640003141. The reversal of 640003127 is 721300046.

640003127 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 640003127 - 2¹⁶ = 639937591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640003027) 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, 2147513 + ... + 2147810.

It is an arithmetic number, because the mean of its divisors is an integer number (161074650).

Almost surely, 2^640003127 is an apocalyptic number.

640003127 is a deficient number, since it is larger than the sum of its proper divisors (4295473).

640003127 is a wasteful number, since it uses less digits than its factorization.

640003127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4295472.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 640003127 is about 25298.2830840356. The cubic root of 640003127 is about 861.7752795349.

The spelling of 640003127 in words is "six hundred forty million, three thousand, one hundred twenty-seven".