640087603 has 4 divisors (see below), whose sum is σ = 640201320. Its totient is φ = 639973888.

The previous prime is 640087571. The next prime is 640087619. The reversal of 640087603 is 306780046.

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 640087603 - 2⁵ = 640087571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (640087663) 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, 47950 + ... + 59827.

It is an arithmetic number, because the mean of its divisors is an integer number (160050330).

Almost surely, 2^640087603 is an apocalyptic number.

640087603 is a deficient number, since it is larger than the sum of its proper divisors (113717).

640087603 is a wasteful number, since it uses less digits than its factorization.

640087603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113716.

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 640087603 is about 25299.9526284141. The cubic root of 640087603 is about 861.8131939985.

The spelling of 640087603 in words is "six hundred forty million, eighty-seven thousand, six hundred three".