631327061 has 8 divisors (see below), whose sum is σ = 647826648. Its totient is φ = 614880000.

The previous prime is 631327009. The next prime is 631327087. The reversal of 631327061 is 160723136.

It can be written as a sum of positive squares in 4 ways, for example, as 9572836 + 621754225 = 3094^2 + 24935^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-631327061 is a prime.

It is a super-4 number, since 4×631327061⁴ (a number of 36 digits) contains 4444 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631327001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11831 + ... + 37451.

It is an arithmetic number, because the mean of its divisors is an integer number (80978331).

Almost surely, 2^631327061 is an apocalyptic number.

It is an amenable number.

631327061 is a deficient number, since it is larger than the sum of its proper divisors (16499587).

631327061 is a wasteful number, since it uses less digits than its factorization.

631327061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26263.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 631327061 is about 25126.2225772200. Note that the first 3 decimals coincide. The cubic root of 631327061 is about 857.8633913851.

The spelling of 631327061 in words is "six hundred thirty-one million, three hundred twenty-seven thousand, sixty-one".