1287940463 has 2 divisors, whose sum is σ = 1287940464. Its totient is φ = 1287940462.

The previous prime is 1287940447. The next prime is 1287940471. The reversal of 1287940463 is 3640497821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1287940463 - 2⁴ = 1287940447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1287940063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643970231 + 643970232.

It is an arithmetic number, because the mean of its divisors is an integer number (643970232).

Almost surely, 2^1287940463 is an apocalyptic number.

1287940463 is a deficient number, since it is larger than the sum of its proper divisors (1).

1287940463 is an equidigital number, since it uses as much as digits as its factorization.

1287940463 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 1287940463 is about 35887.8874134436. The cubic root of 1287940463 is about 1088.0076004078.

The spelling of 1287940463 in words is "one billion, two hundred eighty-seven million, nine hundred forty thousand, four hundred sixty-three".