636676427 has 8 divisors (see below), whose sum is σ = 660361872. Its totient is φ = 613332000.

The previous prime is 636676423. The next prime is 636676433. The reversal of 636676427 is 724676636.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 636676427 - 2² = 636676423 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (636676423) 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 7 ways as a sum of consecutive naturals, for example, 81449 + ... + 88922.

It is an arithmetic number, because the mean of its divisors is an integer number (82545234).

Almost surely, 2^636676427 is an apocalyptic number.

636676427 is a deficient number, since it is larger than the sum of its proper divisors (23685445).

636676427 is a wasteful number, since it uses less digits than its factorization.

636676427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170509.

The product of its digits is 1524096, while the sum is 47.

The square root of 636676427 is about 25232.4478994805. The cubic root of 636676427 is about 860.2795319010.

The spelling of 636676427 in words is "six hundred thirty-six million, six hundred seventy-six thousand, four hundred twenty-seven".