1313381611 has 2 divisors, whose sum is σ = 1313381612. Its totient is φ = 1313381610.

The previous prime is 1313381603. The next prime is 1313381647. The reversal of 1313381611 is 1161833131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1313381611 - 2³ = 1313381603 is a prime.

It is a super-2 number, since 2×1313381611² = 3449942512225910642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1313381611.

It is not a weakly prime, because it can be changed into another prime (1313381651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656690805 + 656690806.

It is an arithmetic number, because the mean of its divisors is an integer number (656690806).

Almost surely, 2^1313381611 is an apocalyptic number.

1313381611 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313381611 is an equidigital number, since it uses as much as digits as its factorization.

1313381611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 28.

The square root of 1313381611 is about 36240.6072106967. The cubic root of 1313381611 is about 1095.1248750089.

The spelling of 1313381611 in words is "one billion, three hundred thirteen million, three hundred eighty-one thousand, six hundred eleven".