631982489 has 2 divisors, whose sum is σ = 631982490. Its totient is φ = 631982488.

The previous prime is 631982473. The next prime is 631982513. The reversal of 631982489 is 984289136.

It is a happy number.

631982489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 326886400 + 305096089 = 18080^2 + 17467^2 .

It is a cyclic number.

It is not a de Polignac number, because 631982489 - 2⁴ = 631982473 is a prime.

It is not a weakly prime, because it can be changed into another prime (631382489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315991244 + 315991245.

It is an arithmetic number, because the mean of its divisors is an integer number (315991245).

Almost surely, 2^631982489 is an apocalyptic number.

It is an amenable number.

631982489 is a deficient number, since it is larger than the sum of its proper divisors (1).

631982489 is an equidigital number, since it uses as much as digits as its factorization.

631982489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 746496, while the sum is 50.

The square root of 631982489 is about 25139.2619024505. The cubic root of 631982489 is about 858.1601594980.

The spelling of 631982489 in words is "six hundred thirty-one million, nine hundred eighty-two thousand, four hundred eighty-nine".