1287849403 has 2 divisors, whose sum is σ = 1287849404. Its totient is φ = 1287849402.

The previous prime is 1287849383. The next prime is 1287849413. The reversal of 1287849403 is 3049487821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1287849403 - 2²⁵ = 1254294971 is a prime.

It is not a weakly prime, because it can be changed into another prime (1287849413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643924701 + 643924702.

It is an arithmetic number, because the mean of its divisors is an integer number (643924702).

Almost surely, 2^1287849403 is an apocalyptic number.

1287849403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1287849403 is an equidigital number, since it uses as much as digits as its factorization.

1287849403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 387072, while the sum is 46.

The square root of 1287849403 is about 35886.6187178452. The cubic root of 1287849403 is about 1087.9819583563.

The spelling of 1287849403 in words is "one billion, two hundred eighty-seven million, eight hundred forty-nine thousand, four hundred three".