634143974 has 4 divisors (see below), whose sum is σ = 951215964. Its totient is φ = 317071986.

The previous prime is 634143973. The next prime is 634143989. The reversal of 634143974 is 479341436.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634143973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158535992 + ... + 158535995.

It is an arithmetic number, because the mean of its divisors is an integer number (237803991).

Almost surely, 2^634143974 is an apocalyptic number.

634143974 is a deficient number, since it is larger than the sum of its proper divisors (317071990).

634143974 is a wasteful number, since it uses less digits than its factorization.

634143974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317071989.

The product of its digits is 217728, while the sum is 41.

The square root of 634143974 is about 25182.2154307360. The cubic root of 634143974 is about 859.1373962963.

The spelling of 634143974 in words is "six hundred thirty-four million, one hundred forty-three thousand, nine hundred seventy-four".