634384969 has 9 divisors (see below), whose sum is σ = 643868103. Its totient is φ = 625040592.

The previous prime is 634384967. The next prime is 634384979. The reversal of 634384969 is 969483436.

The square root of 634384969 is 25187.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 121815369 + 512569600 = 11037^2 + 22640^2 .

It is not a de Polignac number, because 634384969 - 2¹ = 634384967 is a prime.

It is a super-2 number, since 2×634384969² = 804888577786261922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634384963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2241502 + ... + 2241784.

Almost surely, 2^634384969 is an apocalyptic number.

634384969 is the 25187-th square number.

634384969 is the 12594-th centered octagonal number.

It is an amenable number.

634384969 is a deficient number, since it is larger than the sum of its proper divisors (9483134).

634384969 is an frugal number, since it uses more digits than its factorization.

634384969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744 (or 372 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 52.

The cubic root of 634384969 is about 859.2462157456.

The spelling of 634384969 in words is "six hundred thirty-four million, three hundred eighty-four thousand, nine hundred sixty-nine".