634021471 has 2 divisors, whose sum is σ = 634021472. Its totient is φ = 634021470.

The previous prime is 634021459. The next prime is 634021543. The reversal of 634021471 is 174120436.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 634021471 - 2⁷ = 634021343 is a prime.

It is a super-3 number, since 3×634021471³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634021441) 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, 317010735 + 317010736.

It is an arithmetic number, because the mean of its divisors is an integer number (317010736).

Almost surely, 2^634021471 is an apocalyptic number.

634021471 is a deficient number, since it is larger than the sum of its proper divisors (1).

634021471 is an equidigital number, since it uses as much as digits as its factorization.

634021471 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 634021471 is about 25179.7829815906. The cubic root of 634021471 is about 859.0820704341.

The spelling of 634021471 in words is "six hundred thirty-four million, twenty-one thousand, four hundred seventy-one".