13775691 has 8 divisors (see below), whose sum is σ = 18668944. Its totient is φ = 9033120.

The previous prime is 13775681. The next prime is 13775701. The reversal of 13775691 is 19657731.

13775691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13775681) and next prime (13775701).

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

It is not a de Polignac number, because 13775691 - 2¹⁰ = 13774667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13775621) 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, 37456 + ... + 37821.

It is an arithmetic number, because the mean of its divisors is an integer number (2333618).

Almost surely, 2^13775691 is an apocalyptic number.

13775691 is a deficient number, since it is larger than the sum of its proper divisors (4893253).

13775691 is an equidigital number, since it uses as much as digits as its factorization.

13775691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75341.

The product of its digits is 39690, while the sum is 39.

The square root of 13775691 is about 3711.5618006440. The cubic root of 13775691 is about 239.7201077393.

The spelling of 13775691 in words is "thirteen million, seven hundred seventy-five thousand, six hundred ninety-one".