13642493 has 4 divisors (see below), whose sum is σ = 13650588. Its totient is φ = 13634400.

The previous prime is 13642477. The next prime is 13642501. The reversal of 13642493 is 39424631.

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 can be written as a sum of positive squares in 2 ways, for example, as 5098564 + 8543929 = 2258^2 + 2923^2 .

It is a cyclic number.

It is not a de Polignac number, because 13642493 - 2⁴ = 13642477 is a prime.

It is a super-2 number, since 2×13642493² = 372235230510098, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13642423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 458 + ... + 5243.

It is an arithmetic number, because the mean of its divisors is an integer number (3412647).

Almost surely, 2^13642493 is an apocalyptic number.

It is an amenable number.

13642493 is a deficient number, since it is larger than the sum of its proper divisors (8095).

13642493 is an equidigital number, since it uses as much as digits as its factorization.

13642493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8094.

The product of its digits is 15552, while the sum is 32.

The square root of 13642493 is about 3693.5745559011. The cubic root of 13642493 is about 238.9449812956.

The spelling of 13642493 in words is "thirteen million, six hundred forty-two thousand, four hundred ninety-three".