1316252789 has 4 divisors (see below), whose sum is σ = 1320405324. Its totient is φ = 1312100256.

The previous prime is 1316252779. The next prime is 1316252803. The reversal of 1316252789 is 9872526131.

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

It can be written as a sum of positive squares in 2 ways, for example, as 45900625 + 1270352164 = 6775^2 + 35642^2 .

It is a cyclic number.

It is not a de Polignac number, because 1316252789 - 2¹⁶ = 1316187253 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 (1316252779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2075792 + ... + 2076425.

It is an arithmetic number, because the mean of its divisors is an integer number (330101331).

Almost surely, 2^1316252789 is an apocalyptic number.

It is an amenable number.

1316252789 is a deficient number, since it is larger than the sum of its proper divisors (4152535).

1316252789 is an equidigital number, since it uses as much as digits as its factorization.

1316252789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4152534.

The product of its digits is 181440, while the sum is 44.

The square root of 1316252789 is about 36280.1983043092. The cubic root of 1316252789 is about 1095.9223101577.

The spelling of 1316252789 in words is "one billion, three hundred sixteen million, two hundred fifty-two thousand, seven hundred eighty-nine".