1311904775 has 6 divisors (see below), whose sum is σ = 1626761952. Its totient is φ = 1049523800.

The previous prime is 1311904771. The next prime is 1311904787. The reversal of 1311904775 is 5774091131.

It is not a de Polignac number, because 1311904775 - 2² = 1311904771 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 (1311904771) 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, 26238071 + ... + 26238120.

It is an arithmetic number, because the mean of its divisors is an integer number (271126992).

Almost surely, 2^1311904775 is an apocalyptic number.

1311904775 is a deficient number, since it is larger than the sum of its proper divisors (314857177).

1311904775 is an equidigital number, since it uses as much as digits as its factorization.

1311904775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52476201 (or 52476196 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 38.

The square root of 1311904775 is about 36220.2260484387. The cubic root of 1311904775 is about 1094.7142488802.

The spelling of 1311904775 in words is "one billion, three hundred eleven million, nine hundred four thousand, seven hundred seventy-five".