13997311 has 4 divisors (see below), whose sum is σ = 14010624. Its totient is φ = 13984000.

The previous prime is 13997309. The next prime is 13997323. The reversal of 13997311 is 11379931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11379931 = 2657 ⋅4283.

It is a cyclic number.

It is not a de Polignac number, because 13997311 - 2¹ = 13997309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13997351) 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, 4930 + ... + 7231.

It is an arithmetic number, because the mean of its divisors is an integer number (3502656).

Almost surely, 2^13997311 is an apocalyptic number.

13997311 is a deficient number, since it is larger than the sum of its proper divisors (13313).

13997311 is a wasteful number, since it uses less digits than its factorization.

13997311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13312.

The product of its digits is 5103, while the sum is 34.

The square root of 13997311 is about 3741.2980367781. The cubic root of 13997311 is about 240.9987947806.

The spelling of 13997311 in words is "thirteen million, nine hundred ninety-seven thousand, three hundred eleven".