637079459 has 4 divisors (see below), whose sum is σ = 637661304. Its totient is φ = 636497616.

The previous prime is 637079447. The next prime is 637079473. The reversal of 637079459 is 954970736.

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 637079459 - 2¹² = 637075363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (637079489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 289277 + ... + 291470.

It is an arithmetic number, because the mean of its divisors is an integer number (159415326).

Almost surely, 2^637079459 is an apocalyptic number.

637079459 is a deficient number, since it is larger than the sum of its proper divisors (581845).

637079459 is a wasteful number, since it uses less digits than its factorization.

637079459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581844.

The product of its (nonzero) digits is 1428840, while the sum is 50.

The square root of 637079459 is about 25240.4330192649. The cubic root of 637079459 is about 860.4610197183.

The spelling of 637079459 in words is "six hundred thirty-seven million, seventy-nine thousand, four hundred fifty-nine".