13771791 has 12 divisors (see below), whose sum is σ = 21701160. Its totient is φ = 8346480.

The previous prime is 13771763. The next prime is 13771801. The reversal of 13771791 is 19717731.

It is not a de Polignac number, because 13771791 - 2⁶ = 13771727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13771711) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69456 + ... + 69653.

It is an arithmetic number, because the mean of its divisors is an integer number (1808430).

Almost surely, 2^13771791 is an apocalyptic number.

13771791 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13771791 is a deficient number, since it is larger than the sum of its proper divisors (7929369).

13771791 is a wasteful number, since it uses less digits than its factorization.

13771791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139126 (or 139123 counting only the distinct ones).

The product of its digits is 9261, while the sum is 36.

The square root of 13771791 is about 3711.0363781564. The cubic root of 13771791 is about 239.6974834257.

The spelling of 13771791 in words is "thirteen million, seven hundred seventy-one thousand, seven hundred ninety-one".