13877642 has 4 divisors (see below), whose sum is σ = 20816466. Its totient is φ = 6938820.

The previous prime is 13877641. The next prime is 13877651. The reversal of 13877642 is 24677831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24677831 = 89 ⋅277279.

It can be written as a sum of positive squares in only one way, i.e., 13402921 + 474721 = 3661^2 + 689^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13877596 and 13877605.

It is not an unprimeable number, because it can be changed into a prime (13877641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3469409 + ... + 3469412.

Almost surely, 2^13877642 is an apocalyptic number.

13877642 is a deficient number, since it is larger than the sum of its proper divisors (6938824).

13877642 is an equidigital number, since it uses as much as digits as its factorization.

13877642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6938823.

The product of its digits is 56448, while the sum is 38.

The square root of 13877642 is about 3725.2707284169. The cubic root of 13877642 is about 240.3100275804.

The spelling of 13877642 in words is "thirteen million, eight hundred seventy-seven thousand, six hundred forty-two".