636428627 has 2 divisors, whose sum is σ = 636428628. Its totient is φ = 636428626.

The previous prime is 636428621. The next prime is 636428633. The reversal of 636428627 is 726824636.

It is a balanced prime because it is at equal distance from previous prime (636428621) and next prime (636428633).

It is a cyclic number.

It is not a de Polignac number, because 636428627 - 2¹⁸ = 636166483 is a prime.

It is a super-3 number, since 3×636428627³ (a number of 27 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (636428621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318214313 + 318214314.

It is an arithmetic number, because the mean of its divisors is an integer number (318214314).

Almost surely, 2^636428627 is an apocalyptic number.

636428627 is a deficient number, since it is larger than the sum of its proper divisors (1).

636428627 is an equidigital number, since it uses as much as digits as its factorization.

636428627 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 44.

The square root of 636428627 is about 25227.5370775666. The cubic root of 636428627 is about 860.1679079940.

The spelling of 636428627 in words is "six hundred thirty-six million, four hundred twenty-eight thousand, six hundred twenty-seven".