6431959487 has 2 divisors, whose sum is σ = 6431959488. Its totient is φ = 6431959486.

The previous prime is 6431959463. The next prime is 6431959493. The reversal of 6431959487 is 7849591346.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6431959487 - 2¹⁴ = 6431943103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6431259487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3215979743 + 3215979744.

It is an arithmetic number, because the mean of its divisors is an integer number (3215979744).

Almost surely, 2^6431959487 is an apocalyptic number.

6431959487 is a deficient number, since it is larger than the sum of its proper divisors (1).

6431959487 is an equidigital number, since it uses as much as digits as its factorization.

6431959487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6531840, while the sum is 56.

The square root of 6431959487 is about 80199.4980470576. The cubic root of 6431959487 is about 1859.7208783569.

The spelling of 6431959487 in words is "six billion, four hundred thirty-one million, nine hundred fifty-nine thousand, four hundred eighty-seven".