634811487 has 16 divisors (see below), whose sum is σ = 872406528. Its totient is φ = 410339520.

The previous prime is 634811483. The next prime is 634811491. The reversal of 634811487 is 784118436.

It is an interprime number because it is at equal distance from previous prime (634811483) and next prime (634811491).

It is not a de Polignac number, because 634811487 - 2² = 634811483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634811483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4218 + ... + 35880.

It is an arithmetic number, because the mean of its divisors is an integer number (54525408).

Almost surely, 2^634811487 is an apocalyptic number.

634811487 is a deficient number, since it is larger than the sum of its proper divisors (237595041).

634811487 is a wasteful number, since it uses less digits than its factorization.

634811487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31870.

The product of its digits is 129024, while the sum is 42.

The square root of 634811487 is about 25195.4656039534. The cubic root of 634811487 is about 859.4387391569.

The spelling of 634811487 in words is "six hundred thirty-four million, eight hundred eleven thousand, four hundred eighty-seven".