631487 has 2 divisors, whose sum is σ = 631488. Its totient is φ = 631486.

The previous prime is 631483. The next prime is 631507. The reversal of 631487 is 784136.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 631487 - 2² = 631483 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315743 + 315744.

It is an arithmetic number, because the mean of its divisors is an integer number (315744).

2⁶³¹⁴⁸⁷ is an apocalyptic number.

631487 is a deficient number, since it is larger than the sum of its proper divisors (1).

631487 is an equidigital number, since it uses as much as digits as its factorization.

631487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 29.

The square root of 631487 is about 794.6615631827. The cubic root of 631487 is about 85.7935828339.

The spelling of 631487 in words is "six hundred thirty-one thousand, four hundred eighty-seven".