634243163 has 4 divisors (see below), whose sum is σ = 648993048. Its totient is φ = 619493280.

The previous prime is 634243153. The next prime is 634243171. The reversal of 634243163 is 361342436.

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 634243163 - 2²⁸ = 365807707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634243153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7374878 + ... + 7374963.

It is an arithmetic number, because the mean of its divisors is an integer number (162248262).

Almost surely, 2^634243163 is an apocalyptic number.

634243163 is a deficient number, since it is larger than the sum of its proper divisors (14749885).

634243163 is a wasteful number, since it uses less digits than its factorization.

634243163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14749884.

The product of its digits is 31104, while the sum is 32.

The square root of 634243163 is about 25184.1847793412. The cubic root of 634243163 is about 859.1821876686.

Adding to 634243163 its reverse (361342436), we get a palindrome (995585599).

The spelling of 634243163 in words is "six hundred thirty-four million, two hundred forty-three thousand, one hundred sixty-three".