13528691 has 6 divisors (see below), whose sum is σ = 14771892. Its totient is φ = 12287720.

The previous prime is 13528681. The next prime is 13528693. The reversal of 13528691 is 19682531.

It is not a de Polignac number, because 13528691 - 2²² = 9334387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13528693) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11645 + ... + 12753.

It is an arithmetic number, because the mean of its divisors is an integer number (2461982).

Almost surely, 2^13528691 is an apocalyptic number.

13528691 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13528691 is a deficient number, since it is larger than the sum of its proper divisors (1243201).

13528691 is an frugal number, since it uses more digits than its factorization.

13528691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2229 (or 1120 counting only the distinct ones).

The product of its digits is 12960, while the sum is 35.

The square root of 13528691 is about 3678.1368925041. The cubic root of 13528691 is about 238.2787203777.

The spelling of 13528691 in words is "thirteen million, five hundred twenty-eight thousand, six hundred ninety-one".