634684541 has 2 divisors, whose sum is σ = 634684542. Its totient is φ = 634684540.

The previous prime is 634684507. The next prime is 634684571. The reversal of 634684541 is 145486436.

It is a happy number.

634684541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 500819641 + 133864900 = 22379^2 + 11570^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-634684541 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634684571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317342270 + 317342271.

It is an arithmetic number, because the mean of its divisors is an integer number (317342271).

Almost surely, 2^634684541 is an apocalyptic number.

It is an amenable number.

634684541 is a deficient number, since it is larger than the sum of its proper divisors (1).

634684541 is an equidigital number, since it uses as much as digits as its factorization.

634684541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 276480, while the sum is 41.

The square root of 634684541 is about 25192.9462548548. The cubic root of 634684541 is about 859.3814467765.

The spelling of 634684541 in words is "six hundred thirty-four million, six hundred eighty-four thousand, five hundred forty-one".