634397 has 2 divisors, whose sum is σ = 634398. Its totient is φ = 634396.

The previous prime is 634373. The next prime is 634421. The reversal of 634397 is 793436.

It is a balanced prime because it is at equal distance from previous prime (634373) and next prime (634421).

It can be written as a sum of positive squares in only one way, i.e., 606841 + 27556 = 779^2 + 166^2 .

It is a cyclic number.

It is not a de Polignac number, because 634397 - 2⁸ = 634141 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634307) 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, 317198 + 317199.

It is an arithmetic number, because the mean of its divisors is an integer number (317199).

2⁶³⁴³⁹⁷ is an apocalyptic number.

It is an amenable number.

634397 is a deficient number, since it is larger than the sum of its proper divisors (1).

634397 is an equidigital number, since it uses as much as digits as its factorization.

634397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 32.

The square root of 634397 is about 796.4904268100. The cubic root of 634397 is about 85.9251647529.

The spelling of 634397 in words is "six hundred thirty-four thousand, three hundred ninety-seven".