634705901 has 2 divisors, whose sum is σ = 634705902. Its totient is φ = 634705900.

The previous prime is 634705867. The next prime is 634705921. The reversal of 634705901 is 109507436.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 403969801 + 230736100 = 20099^2 + 15190^2 .

It is a cyclic number.

It is not a de Polignac number, because 634705901 - 2⁶ = 634705837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634705921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317352950 + 317352951.

It is an arithmetic number, because the mean of its divisors is an integer number (317352951).

Almost surely, 2^634705901 is an apocalyptic number.

It is an amenable number.

634705901 is a deficient number, since it is larger than the sum of its proper divisors (1).

634705901 is an equidigital number, since it uses as much as digits as its factorization.

634705901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 634705901 is about 25193.3701794738. The cubic root of 634705901 is about 859.3910873568.

The spelling of 634705901 in words is "six hundred thirty-four million, seven hundred five thousand, nine hundred one".