634969 has 2 divisors, whose sum is σ = 634970. Its totient is φ = 634968.

The previous prime is 634943. The next prime is 634979. The reversal of 634969 is 969436.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 608400 + 26569 = 780^2 + 163^2 .

It is a cyclic number.

It is not a de Polignac number, because 634969 - 2⁵ = 634937 is a prime.

It is a super-2 number, since 2×634969² = 806371261922, 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 not a weakly prime, because it can be changed into another prime (634939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317484 + 317485.

It is an arithmetic number, because the mean of its divisors is an integer number (317485).

2⁶³⁴⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

634969 is a deficient number, since it is larger than the sum of its proper divisors (1).

634969 is an equidigital number, since it uses as much as digits as its factorization.

634969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 37.

The square root of 634969 is about 796.8494211581. The cubic root of 634969 is about 85.9509816205.

The spelling of 634969 in words is "six hundred thirty-four thousand, nine hundred sixty-nine".