634729064 has 8 divisors (see below), whose sum is σ = 1190117010. Its totient is φ = 317364528.

The previous prime is 634729037. The next prime is 634729079. The reversal of 634729064 is 460927436.

It can be written as a sum of positive squares in only one way, i.e., 612166564 + 22562500 = 24742^2 + 4750^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39670559 + ... + 39670574.

Almost surely, 2^634729064 is an apocalyptic number.

It is an amenable number.

634729064 is a deficient number, since it is larger than the sum of its proper divisors (555387946).

634729064 is a wasteful number, since it uses less digits than its factorization.

634729064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79341139 (or 79341135 counting only the distinct ones).

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

The square root of 634729064 is about 25193.8298795558. The cubic root of 634729064 is about 859.4015414551.

The spelling of 634729064 in words is "six hundred thirty-four million, seven hundred twenty-nine thousand, sixty-four".