631264129 has 8 divisors (see below), whose sum is σ = 652243712. Its totient is φ = 610323120.

The previous prime is 631264091. The next prime is 631264157. The reversal of 631264129 is 921462136.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 631264129 - 2⁹ = 631263617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 631264094 and 631264103.

It is not an unprimeable number, because it can be changed into a prime (631264169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25747 + ... + 43879.

It is an arithmetic number, because the mean of its divisors is an integer number (81530464).

Almost surely, 2^631264129 is an apocalyptic number.

It is an amenable number.

631264129 is a deficient number, since it is larger than the sum of its proper divisors (20979583).

631264129 is a wasteful number, since it uses less digits than its factorization.

631264129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19287.

The product of its digits is 15552, while the sum is 34.

The square root of 631264129 is about 25124.9702288381. The cubic root of 631264129 is about 857.8348858997.

The spelling of 631264129 in words is "six hundred thirty-one million, two hundred sixty-four thousand, one hundred twenty-nine".