634853801 has 2 divisors, whose sum is σ = 634853802. Its totient is φ = 634853800.

The previous prime is 634853777. The next prime is 634853809. The reversal of 634853801 is 108358436.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 326886400 + 307967401 = 18080^2 + 17549^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-634853801 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (634853809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317426900 + 317426901.

It is an arithmetic number, because the mean of its divisors is an integer number (317426901).

Almost surely, 2^634853801 is an apocalyptic number.

It is an amenable number.

634853801 is a deficient number, since it is larger than the sum of its proper divisors (1).

634853801 is an equidigital number, since it uses as much as digits as its factorization.

634853801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 634853801 is about 25196.3053045481. The cubic root of 634853801 is about 859.4578343180.

The spelling of 634853801 in words is "six hundred thirty-four million, eight hundred fifty-three thousand, eight hundred one".