631545487 has 2 divisors, whose sum is σ = 631545488. Its totient is φ = 631545486.

The previous prime is 631545463. The next prime is 631545493. The reversal of 631545487 is 784545136.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 631545487 - 2²⁷ = 497327759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (631545437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 315772743 + 315772744.

It is an arithmetic number, because the mean of its divisors is an integer number (315772744).

Almost surely, 2^631545487 is an apocalyptic number.

631545487 is a deficient number, since it is larger than the sum of its proper divisors (1).

631545487 is an equidigital number, since it uses as much as digits as its factorization.

631545487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 403200, while the sum is 43.

The square root of 631545487 is about 25130.5687758952. The cubic root of 631545487 is about 857.9623142599.

The spelling of 631545487 in words is "six hundred thirty-one million, five hundred forty-five thousand, four hundred eighty-seven".