634380671 has 2 divisors, whose sum is σ = 634380672. Its totient is φ = 634380670.

The previous prime is 634380661. The next prime is 634380673. The reversal of 634380671 is 176083436.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 634380671 - 2¹⁴ = 634364287 is a prime.

Together with 634380673, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634380673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317190335 + 317190336.

It is an arithmetic number, because the mean of its divisors is an integer number (317190336).

Almost surely, 2^634380671 is an apocalyptic number.

634380671 is a deficient number, since it is larger than the sum of its proper divisors (1).

634380671 is an equidigital number, since it uses as much as digits as its factorization.

634380671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 634380671 is about 25186.9146780625. The cubic root of 634380671 is about 859.2442752579.

The spelling of 634380671 in words is "six hundred thirty-four million, three hundred eighty thousand, six hundred seventy-one".