634688941 has 2 divisors, whose sum is σ = 634688942. Its totient is φ = 634688940.

The previous prime is 634688917. The next prime is 634688963. The reversal of 634688941 is 149886436.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 366875716 + 267813225 = 19154^2 + 16365^2 .

It is a cyclic number.

It is not a de Polignac number, because 634688941 - 2⁵ = 634688909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634688641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317344470 + 317344471.

It is an arithmetic number, because the mean of its divisors is an integer number (317344471).

Almost surely, 2^634688941 is an apocalyptic number.

It is an amenable number.

634688941 is a deficient number, since it is larger than the sum of its proper divisors (1).

634688941 is an equidigital number, since it uses as much as digits as its factorization.

634688941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 995328, while the sum is 49.

The square root of 634688941 is about 25193.0335807342. The cubic root of 634688941 is about 859.3834326816.

The spelling of 634688941 in words is "six hundred thirty-four million, six hundred eighty-eight thousand, nine hundred forty-one".