634381001 has 2 divisors, whose sum is σ = 634381002. Its totient is φ = 634381000.

The previous prime is 634380973. The next prime is 634381037. The reversal of 634381001 is 100183436.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 321126400 + 313254601 = 17920^2 + 17699^2 .

It is a cyclic number.

It is not a de Polignac number, because 634381001 - 2²⁶ = 567272137 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (634381301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317190500 + 317190501.

It is an arithmetic number, because the mean of its divisors is an integer number (317190501).

Almost surely, 2^634381001 is an apocalyptic number.

It is an amenable number.

634381001 is a deficient number, since it is larger than the sum of its proper divisors (1).

634381001 is an equidigital number, since it uses as much as digits as its factorization.

634381001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 634381001 is about 25186.9212290824. The cubic root of 634381001 is about 859.2444242487.

The spelling of 634381001 in words is "six hundred thirty-four million, three hundred eighty-one thousand, one".