1311885903 has 8 divisors (see below), whose sum is σ = 1852074288. Its totient is φ = 823144064.

The previous prime is 1311885893. The next prime is 1311885917. The reversal of 1311885903 is 3095881131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1311885903 - 2⁵ = 1311885871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311885923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12861576 + ... + 12861677.

It is an arithmetic number, because the mean of its divisors is an integer number (231509286).

Almost surely, 2^1311885903 is an apocalyptic number.

1311885903 is a deficient number, since it is larger than the sum of its proper divisors (540188385).

1311885903 is a wasteful number, since it uses less digits than its factorization.

1311885903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25723273.

The product of its (nonzero) digits is 25920, while the sum is 39.

The square root of 1311885903 is about 36219.9655300775. The cubic root of 1311885903 is about 1094.7089996308.

The spelling of 1311885903 in words is "one billion, three hundred eleven million, eight hundred eighty-five thousand, nine hundred three".