13055691 has 8 divisors (see below), whose sum is σ = 18990144. Its totient is φ = 7912520.

The previous prime is 13055683. The next prime is 13055701. The reversal of 13055691 is 19655031.

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

It is not a de Polignac number, because 13055691 - 2³ = 13055683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13050691) 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, 197781 + ... + 197846.

It is an arithmetic number, because the mean of its divisors is an integer number (2373768).

Almost surely, 2^13055691 is an apocalyptic number.

13055691 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13055691 is a deficient number, since it is larger than the sum of its proper divisors (5934453).

13055691 is a wasteful number, since it uses less digits than its factorization.

13055691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395641.

The product of its (nonzero) digits is 4050, while the sum is 30.

The square root of 13055691 is about 3613.2659741569. The cubic root of 13055691 is about 235.4687550111.

It can be divided in two parts, 1305 and 5691, that added together give a palindrome (6996).

The spelling of 13055691 in words is "thirteen million, fifty-five thousand, six hundred ninety-one".