1288063391 has 8 divisors (see below), whose sum is σ = 1334657520. Its totient is φ = 1241614528.

The previous prime is 1288063379. The next prime is 1288063417. The reversal of 1288063391 is 1933608821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1288063391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288063331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18101 + ... + 53886.

It is an arithmetic number, because the mean of its divisors is an integer number (166832190).

Almost surely, 2^1288063391 is an apocalyptic number.

1288063391 is a deficient number, since it is larger than the sum of its proper divisors (46594129).

1288063391 is an equidigital number, since it uses as much as digits as its factorization.

1288063391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72633.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 1288063391 is about 35889.6000395658. The cubic root of 1288063391 is about 1088.0422144155.

The spelling of 1288063391 in words is "one billion, two hundred eighty-eight million, sixty-three thousand, three hundred ninety-one".