1287117383 has 2 divisors, whose sum is σ = 1287117384. Its totient is φ = 1287117382.

The previous prime is 1287117373. The next prime is 1287117401. The reversal of 1287117383 is 3837117821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1287117383 - 2⁸ = 1287117127 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1287117383.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1287117373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643558691 + 643558692.

It is an arithmetic number, because the mean of its divisors is an integer number (643558692).

Almost surely, 2^1287117383 is an apocalyptic number.

1287117383 is a deficient number, since it is larger than the sum of its proper divisors (1).

1287117383 is an equidigital number, since it uses as much as digits as its factorization.

1287117383 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56448, while the sum is 41.

The square root of 1287117383 is about 35876.4182019331. The cubic root of 1287117383 is about 1087.7757811702.

The spelling of 1287117383 in words is "one billion, two hundred eighty-seven million, one hundred seventeen thousand, three hundred eighty-three".