13642663 has 4 divisors (see below), whose sum is σ = 13653640. Its totient is φ = 13631688.

The previous prime is 13642649. The next prime is 13642667. The reversal of 13642663 is 36624631.

13642663 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 13642663 - 2⁵ = 13642631 is a prime.

It is a super-2 number, since 2×13642663² = 372244507463138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13642667) 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, 3345 + ... + 6202.

It is an arithmetic number, because the mean of its divisors is an integer number (3413410).

Almost surely, 2^13642663 is an apocalyptic number.

13642663 is a deficient number, since it is larger than the sum of its proper divisors (10977).

13642663 is an equidigital number, since it uses as much as digits as its factorization.

13642663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10976.

The product of its digits is 15552, while the sum is 31.

The square root of 13642663 is about 3693.5975687668. The cubic root of 13642663 is about 238.9459737946.

The spelling of 13642663 in words is "thirteen million, six hundred forty-two thousand, six hundred sixty-three".