13998771 has 8 divisors (see below), whose sum is σ = 20738960. Its totient is φ = 9332496.

The previous prime is 13998737. The next prime is 13998773. The reversal of 13998771 is 17789931.

It is not a de Polignac number, because 13998771 - 2¹⁴ = 13982387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13998773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 259210 + ... + 259263.

It is an arithmetic number, because the mean of its divisors is an integer number (2592370).

Almost surely, 2^13998771 is an apocalyptic number.

13998771 is a deficient number, since it is larger than the sum of its proper divisors (6740189).

13998771 is an equidigital number, since it uses as much as digits as its factorization.

13998771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518482 (or 518476 counting only the distinct ones).

The product of its digits is 95256, while the sum is 45.

The square root of 13998771 is about 3741.4931511363. The cubic root of 13998771 is about 241.0071736758.

The spelling of 13998771 in words is "thirteen million, nine hundred ninety-eight thousand, seven hundred seventy-one".