634247 has 2 divisors, whose sum is σ = 634248. Its totient is φ = 634246.

The previous prime is 634241. The next prime is 634261. The reversal of 634247 is 742436.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 634247 - 2⁸ = 633991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317123 + 317124.

It is an arithmetic number, because the mean of its divisors is an integer number (317124).

2⁶³⁴²⁴⁷ is an apocalyptic number.

634247 is a deficient number, since it is larger than the sum of its proper divisors (1).

634247 is an equidigital number, since it uses as much as digits as its factorization.

634247 is an odious number, because the sum of its binary digits is odd.

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

The square root of 634247 is about 796.3962581529. The cubic root of 634247 is about 85.9183920272.

The spelling of 634247 in words is "six hundred thirty-four thousand, two hundred forty-seven".