634726487 has 2 divisors, whose sum is σ = 634726488. Its totient is φ = 634726486.

The previous prime is 634726363. The next prime is 634726489. The reversal of 634726487 is 784627436.

634726487 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 634726487 - 2¹⁰ = 634725463 is a prime.

It is a super-2 number, since 2×634726487² = 805755426598722338, which contains 22 as substring.

Together with 634726489, 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 (634726489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317363243 + 317363244.

It is an arithmetic number, because the mean of its divisors is an integer number (317363244).

Almost surely, 2^634726487 is an apocalyptic number.

634726487 is a deficient number, since it is larger than the sum of its proper divisors (1).

634726487 is an equidigital number, since it uses as much as digits as its factorization.

634726487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1354752, while the sum is 47.

The square root of 634726487 is about 25193.7787360293. The cubic root of 634726487 is about 859.4003783968.

The spelling of 634726487 in words is "six hundred thirty-four million, seven hundred twenty-six thousand, four hundred eighty-seven".