1311302997 has 6 divisors (see below), whose sum is σ = 1894104342. Its totient is φ = 874201992.

The previous prime is 1311302989. The next prime is 1311303001. The reversal of 1311302997 is 7992031131.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 836019396 + 475283601 = 28914^2 + 21801^2 .

It is not a de Polignac number, because 1311302997 - 2³ = 1311302989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311302987) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72850158 + ... + 72850175.

It is an arithmetic number, because the mean of its divisors is an integer number (315684057).

Almost surely, 2^1311302997 is an apocalyptic number.

It is an amenable number.

1311302997 is a deficient number, since it is larger than the sum of its proper divisors (582801345).

1311302997 is a wasteful number, since it uses less digits than its factorization.

1311302997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145700339 (or 145700336 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 36.

The square root of 1311302997 is about 36211.9178862429. The cubic root of 1311302997 is about 1094.5468394469.

The spelling of 1311302997 in words is "one billion, three hundred eleven million, three hundred two thousand, nine hundred ninety-seven".