634395397 has 2 divisors, whose sum is σ = 634395398. Its totient is φ = 634395396.

The previous prime is 634395379. The next prime is 634395413. The reversal of 634395397 is 793593436.

Together with previous prime (634395379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 344510721 + 289884676 = 18561^2 + 17026^2 .

It is a cyclic number.

It is not a de Polignac number, because 634395397 - 2¹¹ = 634393349 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 634395397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634395347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317197698 + 317197699.

It is an arithmetic number, because the mean of its divisors is an integer number (317197699).

Almost surely, 2^634395397 is an apocalyptic number.

It is an amenable number.

634395397 is a deficient number, since it is larger than the sum of its proper divisors (1).

634395397 is an equidigital number, since it uses as much as digits as its factorization.

634395397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1837080, while the sum is 49.

The square root of 634395397 is about 25187.2070107029. The cubic root of 634395397 is about 859.2509238071.

The spelling of 634395397 in words is "six hundred thirty-four million, three hundred ninety-five thousand, three hundred ninety-seven".