634247871 has 8 divisors (see below), whose sum is σ = 857248560. Its totient is φ = 417039552.

The previous prime is 634247857. The next prime is 634247881. The reversal of 634247871 is 178742436.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 634247871 - 2⁹ = 634247359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634247851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1447836 + ... + 1448273.

It is an arithmetic number, because the mean of its divisors is an integer number (107156070).

Almost surely, 2^634247871 is an apocalyptic number.

634247871 is a deficient number, since it is larger than the sum of its proper divisors (223000689).

634247871 is a wasteful number, since it uses less digits than its factorization.

634247871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2896185.

The product of its digits is 225792, while the sum is 42.

The square root of 634247871 is about 25184.2782505276. The cubic root of 634247871 is about 859.1843135723.

The spelling of 634247871 in words is "six hundred thirty-four million, two hundred forty-seven thousand, eight hundred seventy-one".