634143503 has 16 divisors (see below), whose sum is σ = 769077504. Its totient is φ = 510437760.

The previous prime is 634143473. The next prime is 634143509. The reversal of 634143503 is 305341436.

It is not a de Polignac number, because 634143503 - 2¹⁴ = 634127119 is a prime.

It is a super-2 number, since 2×634143503² = 804275964794222018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634143509) 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, 49868 + ... + 61278.

It is an arithmetic number, because the mean of its divisors is an integer number (48067344).

Almost surely, 2^634143503 is an apocalyptic number.

634143503 is a deficient number, since it is larger than the sum of its proper divisors (134934001).

634143503 is a wasteful number, since it uses less digits than its factorization.

634143503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11902.

The product of its (nonzero) digits is 12960, while the sum is 29.

The square root of 634143503 is about 25182.2060788963. The cubic root of 634143503 is about 859.1371835928.

Adding to 634143503 its reverse (305341436), we get a palindrome (939484939).

The spelling of 634143503 in words is "six hundred thirty-four million, one hundred forty-three thousand, five hundred three".