631623439 has 8 divisors (see below), whose sum is σ = 636244992. Its totient is φ = 627015960.

The previous prime is 631623437. The next prime is 631623511. The reversal of 631623439 is 934326136.

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 631623439 - 2¹ = 631623437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 631623398 and 631623407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631623437) 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 7 ways as a sum of consecutive naturals, for example, 96732 + ... + 103054.

It is an arithmetic number, because the mean of its divisors is an integer number (79530624).

Almost surely, 2^631623439 is an apocalyptic number.

631623439 is a deficient number, since it is larger than the sum of its proper divisors (4621553).

631623439 is a wasteful number, since it uses less digits than its factorization.

631623439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7037.

The product of its digits is 69984, while the sum is 37.

The square root of 631623439 is about 25132.1196678673. The cubic root of 631623439 is about 857.9976123913.

The spelling of 631623439 in words is "six hundred thirty-one million, six hundred twenty-three thousand, four hundred thirty-nine".