640714301 has 4 divisors (see below), whose sum is σ = 640765692. Its totient is φ = 640662912.

The previous prime is 640714279. The next prime is 640714303. The reversal of 640714301 is 103417046.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 306775225 + 333939076 = 17515^2 + 18274^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-640714301 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 (640714303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6221 + ... + 36333.

It is an arithmetic number, because the mean of its divisors is an integer number (160191423).

Almost surely, 2^640714301 is an apocalyptic number.

It is an amenable number.

640714301 is a deficient number, since it is larger than the sum of its proper divisors (51391).

640714301 is a wasteful number, since it uses less digits than its factorization.

640714301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51390.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 640714301 is about 25312.3349574866. The cubic root of 640714301 is about 862.0943640717.

The spelling of 640714301 in words is "six hundred forty million, seven hundred fourteen thousand, three hundred one".