634000427 has 2 divisors, whose sum is σ = 634000428. Its totient is φ = 634000426.

The previous prime is 634000421. The next prime is 634000441. The reversal of 634000427 is 724000436.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-634000427 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 634000396 and 634000405.

It is not a weakly prime, because it can be changed into another prime (634000421) 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 as a sum of consecutive naturals, namely, 317000213 + 317000214.

It is an arithmetic number, because the mean of its divisors is an integer number (317000214).

Almost surely, 2^634000427 is an apocalyptic number.

634000427 is a deficient number, since it is larger than the sum of its proper divisors (1).

634000427 is an equidigital number, since it uses as much as digits as its factorization.

634000427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 634000427 is about 25179.3651031951. The cubic root of 634000427 is about 859.0725656439.

Subtracting 634000427 from its reverse (724000436), we obtain a palindrome (90000009).

The spelling of 634000427 in words is "six hundred thirty-four million, four hundred twenty-seven", and thus it is an aban number.