1311478763 has 16 divisors (see below), whose sum is σ = 1526400000. Its totient is φ = 1103611392.

The previous prime is 1311478739. The next prime is 1311478783. The reversal of 1311478763 is 3678741131.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311478763 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1311478763.

It is not an unprimeable number, because it can be changed into a prime (1311478733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92363 + ... + 105611.

It is an arithmetic number, because the mean of its divisors is an integer number (95400000).

Almost surely, 2^1311478763 is an apocalyptic number.

1311478763 is a deficient number, since it is larger than the sum of its proper divisors (214921237).

1311478763 is a wasteful number, since it uses less digits than its factorization.

1311478763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13514.

The product of its digits is 84672, while the sum is 41.

The square root of 1311478763 is about 36214.3447131106. The cubic root of 1311478763 is about 1094.5957413217.

The spelling of 1311478763 in words is "one billion, three hundred eleven million, four hundred seventy-eight thousand, seven hundred sixty-three".