13520837 has 8 divisors (see below), whose sum is σ = 15526560. Its totient is φ = 11644560.

The previous prime is 13520827. The next prime is 13520839. The reversal of 13520837 is 73802531.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13520837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13520839) 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, 32138 + ... + 32555.

It is an arithmetic number, because the mean of its divisors is an integer number (1940820).

Almost surely, 2^13520837 is an apocalyptic number.

It is an amenable number.

13520837 is a deficient number, since it is larger than the sum of its proper divisors (2005723).

13520837 is a wasteful number, since it uses less digits than its factorization.

13520837 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64723.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 13520837 is about 3677.0690774039. The cubic root of 13520837 is about 238.2326010269.

The spelling of 13520837 in words is "thirteen million, five hundred twenty thousand, eight hundred thirty-seven".