634451641 has 2 divisors, whose sum is σ = 634451642. Its totient is φ = 634451640.

The previous prime is 634451639. The next prime is 634451651. The reversal of 634451641 is 146154436.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 590295616 + 44156025 = 24296^2 + 6645^2 .

It is a cyclic number.

It is not a de Polignac number, because 634451641 - 2¹ = 634451639 is a prime.

Together with 634451639, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 634451597 and 634451606.

It is not a weakly prime, because it can be changed into another prime (634451621) 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, 317225820 + 317225821.

It is an arithmetic number, because the mean of its divisors is an integer number (317225821).

Almost surely, 2^634451641 is an apocalyptic number.

It is an amenable number.

634451641 is a deficient number, since it is larger than the sum of its proper divisors (1).

634451641 is an equidigital number, since it uses as much as digits as its factorization.

634451641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 34.

The square root of 634451641 is about 25188.3235051482. The cubic root of 634451641 is about 859.2763161103.

The spelling of 634451641 in words is "six hundred thirty-four million, four hundred fifty-one thousand, six hundred forty-one".