13691045 has 8 divisors (see below), whose sum is σ = 16995960. Its totient is φ = 10575040.

The previous prime is 13691033. The next prime is 13691107. The reversal of 13691045 is 54019631.

It can be written as a sum of positive squares in 4 ways, for example, as 2515396 + 11175649 = 1586^2 + 3343^2 .

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

It is not a de Polignac number, because 13691045 - 2²² = 9496741 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a junction number, because it is equal to n+sod(n) for n = 13690999 and 13691017.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47066 + ... + 47355.

It is an arithmetic number, because the mean of its divisors is an integer number (2124495).

Almost surely, 2^13691045 is an apocalyptic number.

It is an amenable number.

13691045 is a deficient number, since it is larger than the sum of its proper divisors (3304915).

13691045 is an equidigital number, since it uses as much as digits as its factorization.

13691045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94455.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 13691045 is about 3700.1412135215. The cubic root of 13691045 is about 239.2281045582.

The spelling of 13691045 in words is "thirteen million, six hundred ninety-one thousand, forty-five".