634943 has 2 divisors, whose sum is σ = 634944. Its totient is φ = 634942.

The previous prime is 634939. The next prime is 634969. The reversal of 634943 is 349436.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 634943 - 2² = 634939 is a prime.

It is a super-2 number, since 2×634943² = 806305226498, which contains 22 as substring.

It is a Chen prime.

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 (634903) 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, 317471 + 317472.

It is an arithmetic number, because the mean of its divisors is an integer number (317472).

2⁶³⁴⁹⁴³ is an apocalyptic number.

634943 is a deficient number, since it is larger than the sum of its proper divisors (1).

634943 is an equidigital number, since it uses as much as digits as its factorization.

634943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 29.

The square root of 634943 is about 796.8331067419. The cubic root of 634943 is about 85.9498084629.

The spelling of 634943 in words is "six hundred thirty-four thousand, nine hundred forty-three".