631141987 has 16 divisors (see below), whose sum is σ = 747230400. Its totient is φ = 521832960.

The previous prime is 631141963. The next prime is 631141999. The reversal of 631141987 is 789141136.

It is a cyclic number.

It is not a de Polignac number, because 631141987 - 2¹⁹ = 630617699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (631141187) 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 15 ways as a sum of consecutive naturals, for example, 13189 + ... + 37897.

It is an arithmetic number, because the mean of its divisors is an integer number (46701900).

Almost surely, 2^631141987 is an apocalyptic number.

631141987 is a deficient number, since it is larger than the sum of its proper divisors (116088413).

631141987 is a wasteful number, since it uses less digits than its factorization.

631141987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24846.

The product of its digits is 36288, while the sum is 40.

The square root of 631141987 is about 25122.5394218021. The cubic root of 631141987 is about 857.7795554275.

The spelling of 631141987 in words is "six hundred thirty-one million, one hundred forty-one thousand, nine hundred eighty-seven".