13691137 has 8 divisors (see below), whose sum is σ = 14661000. Its totient is φ = 12739584.

The previous prime is 13691129. The next prime is 13691149. The reversal of 13691137 is 73119631.

It can be written as a sum of positive squares in 4 ways, for example, as 3806401 + 9884736 = 1951^2 + 3144^2 .

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 13691137 - 2³ = 13691129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13691099 and 13691108.

It is not an unprimeable number, because it can be changed into a prime (13691107) 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, 3012 + ... + 6037.

It is an arithmetic number, because the mean of its divisors is an integer number (1832625).

Almost surely, 2^13691137 is an apocalyptic number.

13691137 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

13691137 is a deficient number, since it is larger than the sum of its proper divisors (969863).

13691137 is an equidigital number, since it uses as much as digits as its factorization.

13691137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9155.

The product of its digits is 3402, while the sum is 31.

The square root of 13691137 is about 3700.1536454585. The cubic root of 13691137 is about 239.2286404057.

The spelling of 13691137 in words is "thirteen million, six hundred ninety-one thousand, one hundred thirty-seven".