1311906893 has 8 divisors (see below), whose sum is σ = 1431433920. Its totient is φ = 1192423680.

The previous prime is 1311906863. The next prime is 1311906899. The reversal of 1311906893 is 3986091131.

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 1311906893 - 2⁶ = 1311906829 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 1311906893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311906899) 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, 106088 + ... + 117806.

It is an arithmetic number, because the mean of its divisors is an integer number (178929240).

Almost surely, 2^1311906893 is an apocalyptic number.

It is an amenable number.

1311906893 is a deficient number, since it is larger than the sum of its proper divisors (119527027).

1311906893 is a wasteful number, since it uses less digits than its factorization.

1311906893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21907.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 1311906893 is about 36220.2552862345. The cubic root of 1311906893 is about 1094.7148379991.

The spelling of 1311906893 in words is "one billion, three hundred eleven million, nine hundred six thousand, eight hundred ninety-three".