634720287 has 8 divisors (see below), whose sum is σ = 852382720. Its totient is φ = 420102360.

The previous prime is 634720267. The next prime is 634720297. The reversal of 634720287 is 782027436.

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

It is not a de Polignac number, because 634720287 - 2¹⁵ = 634687519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634720267) 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, 760639 + ... + 761472.

It is an arithmetic number, because the mean of its divisors is an integer number (106547840).

Almost surely, 2^634720287 is an apocalyptic number.

634720287 is a deficient number, since it is larger than the sum of its proper divisors (217662433).

634720287 is a wasteful number, since it uses less digits than its factorization.

634720287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1522253.

The product of its (nonzero) digits is 112896, while the sum is 39.

The square root of 634720287 is about 25193.6556894787. The cubic root of 634720287 is about 859.3975801838.

The spelling of 634720287 in words is "six hundred thirty-four million, seven hundred twenty thousand, two hundred eighty-seven".