13998439225 has 9 divisors (see below), whose sum is σ = 17358798223. Its totient is φ = 11198278120.

The previous prime is 13998439219. The next prime is 13998439261. The reversal of 13998439225 is 52293489931.

The square root of 13998439225 is 118315.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 5039438121 + 8959001104 = 70989^2 + 94652^2 .

It is not a de Polignac number, because 13998439225 - 2²⁹ = 13461568313 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 579744 + ... + 603406.

Almost surely, 2^13998439225 is an apocalyptic number.

13998439225 is the 118315-th square number.

13998439225 is the 59158-th centered octagonal number.

It is an amenable number.

13998439225 is a deficient number, since it is larger than the sum of its proper divisors (3360358998).

13998439225 is an frugal number, since it uses more digits than its factorization.

13998439225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47336 (or 23668 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 55.

The spelling of 13998439225 in words is "thirteen billion, nine hundred ninety-eight million, four hundred thirty-nine thousand, two hundred twenty-five".