634903 has 2 divisors, whose sum is σ = 634904. Its totient is φ = 634902.

The previous prime is 634901. The next prime is 634927. The reversal of 634903 is 309436.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 634903 - 2¹ = 634901 is a prime.

Together with 634901, it forms a pair of twin primes.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317451 + 317452.

It is an arithmetic number, because the mean of its divisors is an integer number (317452).

2⁶³⁴⁹⁰³ is an apocalyptic number.

634903 is a deficient number, since it is larger than the sum of its proper divisors (1).

634903 is an equidigital number, since it uses as much as digits as its factorization.

634903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 634903 is about 796.8080069879. The cubic root of 634903 is about 85.9480035426.

The spelling of 634903 in words is "six hundred thirty-four thousand, nine hundred three".