1316787266 has 4 divisors (see below), whose sum is σ = 1975180902. Its totient is φ = 658393632.

The previous prime is 1316787259. The next prime is 1316787271. The reversal of 1316787266 is 6627876131.

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

It can be written as a sum of positive squares in only one way, i.e., 763361641 + 553425625 = 27629^2 + 23525^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1316787266.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329196815 + ... + 329196818.

Almost surely, 2^1316787266 is an apocalyptic number.

1316787266 is a deficient number, since it is larger than the sum of its proper divisors (658393636).

1316787266 is an equidigital number, since it uses as much as digits as its factorization.

1316787266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 658393635.

The product of its digits is 508032, while the sum is 47.

The square root of 1316787266 is about 36287.5635169957. The cubic root of 1316787266 is about 1096.0706266535.

The spelling of 1316787266 in words is "one billion, three hundred sixteen million, seven hundred eighty-seven thousand, two hundred sixty-six".