13988771 has 4 divisors (see below), whose sum is σ = 14180472. Its totient is φ = 13797072.

The previous prime is 13988713. The next prime is 13988783. The reversal of 13988771 is 17788931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17788931 = 449 ⋅39619.

It is a cyclic number.

It is not a de Polignac number, because 13988771 - 2¹⁰ = 13987747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13948771) 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, 95741 + ... + 95886.

It is an arithmetic number, because the mean of its divisors is an integer number (3545118).

Almost surely, 2^13988771 is an apocalyptic number.

13988771 is a deficient number, since it is larger than the sum of its proper divisors (191701).

13988771 is an equidigital number, since it uses as much as digits as its factorization.

13988771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191700.

The product of its digits is 84672, while the sum is 44.

The square root of 13988771 is about 3740.1565475258. The cubic root of 13988771 is about 240.9497723072.

The spelling of 13988771 in words is "thirteen million, nine hundred eighty-eight thousand, seven hundred seventy-one".