1288472935391 has 4 divisors (see below), whose sum is σ = 1288617181752. Its totient is φ = 1288328689032.

The previous prime is 1288472935363. The next prime is 1288472935427. The reversal of 1288472935391 is 1935392748821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1288472935391 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 (1288472935691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72109781 + ... + 72127646.

It is an arithmetic number, because the mean of its divisors is an integer number (322154295438).

Almost surely, 2^{1288472935391} is an apocalyptic number.

1288472935391 is a deficient number, since it is larger than the sum of its proper divisors (144246361).

1288472935391 is an equidigital number, since it uses as much as digits as its factorization.

1288472935391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144246360.

The product of its digits is 26127360, while the sum is 62.

The spelling of 1288472935391 in words is "one trillion, two hundred eighty-eight billion, four hundred seventy-two million, nine hundred thirty-five thousand, three hundred ninety-one".