634536349 has 2 divisors, whose sum is σ = 634536350. Its totient is φ = 634536348.

The previous prime is 634536311. The next prime is 634536389. The reversal of 634536349 is 943635436.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 634133124 + 403225 = 25182^2 + 635^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-634536349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634536389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317268174 + 317268175.

It is an arithmetic number, because the mean of its divisors is an integer number (317268175).

Almost surely, 2^634536349 is an apocalyptic number.

It is an amenable number.

634536349 is a deficient number, since it is larger than the sum of its proper divisors (1).

634536349 is an equidigital number, since it uses as much as digits as its factorization.

634536349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 699840, while the sum is 43.

The square root of 634536349 is about 25190.0049424370. The cubic root of 634536349 is about 859.3145561349.

The spelling of 634536349 in words is "six hundred thirty-four million, five hundred thirty-six thousand, three hundred forty-nine".