634737487 has 4 divisors (see below), whose sum is σ = 646713720. Its totient is φ = 622761256.

The previous prime is 634737469. The next prime is 634737539. The reversal of 634737487 is 784737436.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-634737487 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 634737487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634737287) 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 in 3 ways as a sum of consecutive naturals, for example, 5988037 + ... + 5988142.

It is an arithmetic number, because the mean of its divisors is an integer number (161678430).

Almost surely, 2^634737487 is an apocalyptic number.

634737487 is a deficient number, since it is larger than the sum of its proper divisors (11976233).

634737487 is a wasteful number, since it uses less digits than its factorization.

634737487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11976232.

The product of its digits is 2370816, while the sum is 49.

The square root of 634737487 is about 25193.9970429466. The cubic root of 634737487 is about 859.4053429233.

It can be divided in two parts, 6347 and 37487, that added together give a palindrome (43834).

The spelling of 634737487 in words is "six hundred thirty-four million, seven hundred thirty-seven thousand, four hundred eighty-seven".