13525663 has 4 divisors (see below), whose sum is σ = 14237560. Its totient is φ = 12813768.

The previous prime is 13525661. The next prime is 13525697. The reversal of 13525663 is 36652531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36652531 = 233 ⋅157307.

It is a cyclic number.

It is not a de Polignac number, because 13525663 - 2¹ = 13525661 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 (13525661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 355920 + ... + 355957.

It is an arithmetic number, because the mean of its divisors is an integer number (3559390).

Almost surely, 2^13525663 is an apocalyptic number.

13525663 is a deficient number, since it is larger than the sum of its proper divisors (711897).

13525663 is an equidigital number, since it uses as much as digits as its factorization.

13525663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711896.

The product of its digits is 16200, while the sum is 31.

The square root of 13525663 is about 3677.7252480304. The cubic root of 13525663 is about 238.2609418210.

It can be divided in two parts, 1352566 and 3, that added together give a square (1352569 = 1163²).

The spelling of 13525663 in words is "thirteen million, five hundred twenty-five thousand, six hundred sixty-three".