1311032905 has 16 divisors (see below), whose sum is σ = 1936295424. Its totient is φ = 829840320.

The previous prime is 1311032903. The next prime is 1311032909. The reversal of 1311032905 is 5092301131.

It is not a de Polignac number, because 1311032905 - 2¹ = 1311032903 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1311032905.

It is not an unprimeable number, because it can be changed into a prime (1311032903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1440241 + ... + 1441150.

It is an arithmetic number, because the mean of its divisors is an integer number (121018464).

Almost surely, 2^1311032905 is an apocalyptic number.

It is an amenable number.

1311032905 is a deficient number, since it is larger than the sum of its proper divisors (625262519).

1311032905 is a wasteful number, since it uses less digits than its factorization.

1311032905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2881416.

The product of its (nonzero) digits is 810, while the sum is 25.

The square root of 1311032905 is about 36208.1883694835. The cubic root of 1311032905 is about 1094.4716855364.

The spelling of 1311032905 in words is "one billion, three hundred eleven million, thirty-two thousand, nine hundred five".