634612523 has 4 divisors (see below), whose sum is σ = 639609600. Its totient is φ = 629615448.

The previous prime is 634612519. The next prime is 634612529. The reversal of 634612523 is 325216436.

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

It is a cyclic number.

It is not a de Polignac number, because 634612523 - 2² = 634612519 is a prime.

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 634612523.

It is not an unprimeable number, because it can be changed into a prime (634612529) 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, 2498348 + ... + 2498601.

It is an arithmetic number, because the mean of its divisors is an integer number (159902400).

Almost surely, 2^634612523 is an apocalyptic number.

634612523 is a deficient number, since it is larger than the sum of its proper divisors (4997077).

634612523 is a wasteful number, since it uses less digits than its factorization.

634612523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4997076.

The product of its digits is 25920, while the sum is 32.

The square root of 634612523 is about 25191.5168856502. The cubic root of 634612523 is about 859.3489407203.

Adding to 634612523 its reverse (325216436), we get a palindrome (959828959).

The spelling of 634612523 in words is "six hundred thirty-four million, six hundred twelve thousand, five hundred twenty-three".