13401663 has 16 divisors (see below), whose sum is σ = 20342016. Its totient is φ = 7768640.

The previous prime is 13401637. The next prime is 13401667. The reversal of 13401663 is 36610431.

It is not a de Polignac number, because 13401663 - 2¹² = 13397567 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13401667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8070 + ... + 9587.

It is an arithmetic number, because the mean of its divisors is an integer number (1271376).

Almost surely, 2^13401663 is an apocalyptic number.

13401663 is a deficient number, since it is larger than the sum of its proper divisors (6940353).

13401663 is a wasteful number, since it uses less digits than its factorization.

13401663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17694.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 13401663 is about 3660.8281849877. The cubic root of 13401663 is about 237.5305991969.

It can be divided in two parts, 1340 and 1663, that added together give a palindrome (3003).

The spelling of 13401663 in words is "thirteen million, four hundred one thousand, six hundred sixty-three".