634170442 has 4 divisors (see below), whose sum is σ = 951255666. Its totient is φ = 317085220.

The previous prime is 634170437. The next prime is 634170469. The reversal of 634170442 is 244071436.

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

It can be written as a sum of positive squares in only one way, i.e., 615585721 + 18584721 = 24811^2 + 4311^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158542609 + ... + 158542612.

Almost surely, 2^634170442 is an apocalyptic number.

634170442 is a deficient number, since it is larger than the sum of its proper divisors (317085224).

634170442 is a wasteful number, since it uses less digits than its factorization.

634170442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317085223.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 634170442 is about 25182.7409548683. The cubic root of 634170442 is about 859.1493490668.

The spelling of 634170442 in words is "six hundred thirty-four million, one hundred seventy thousand, four hundred forty-two".