634851797 has 2 divisors, whose sum is σ = 634851798. Its totient is φ = 634851796.

The previous prime is 634851793. The next prime is 634851817. The reversal of 634851797 is 797158436.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 501356881 + 133494916 = 22391^2 + 11554^2 .

It is a cyclic number.

It is not a de Polignac number, because 634851797 - 2² = 634851793 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 (634851793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317425898 + 317425899.

It is an arithmetic number, because the mean of its divisors is an integer number (317425899).

Almost surely, 2^634851797 is an apocalyptic number.

It is an amenable number.

634851797 is a deficient number, since it is larger than the sum of its proper divisors (1).

634851797 is an equidigital number, since it uses as much as digits as its factorization.

634851797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 50.

The square root of 634851797 is about 25196.2655367814. The cubic root of 634851797 is about 859.4569299863.

The spelling of 634851797 in words is "six hundred thirty-four million, eight hundred fifty-one thousand, seven hundred ninety-seven".