13720099 has 6 divisors (see below), whose sum is σ = 14020484. Its totient is φ = 13426020.

The previous prime is 13720061. The next prime is 13720127. The reversal of 13720099 is 99002731.

It is not a de Polignac number, because 13720099 - 2¹⁹ = 13195811 is a prime.

It is a super-2 number, since 2×13720099² = 376482233139602, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13720099.

It is not an unprimeable number, because it can be changed into a prime (13720039) 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 in 5 ways as a sum of consecutive naturals, for example, 897 + ... + 5314.

Almost surely, 2^13720099 is an apocalyptic number.

13720099 is a deficient number, since it is larger than the sum of its proper divisors (300385).

13720099 is an frugal number, since it uses more digits than its factorization.

13720099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6305 (or 6258 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 13720099 is about 3704.0651992102. The cubic root of 13720099 is about 239.3972083416.

The spelling of 13720099 in words is "thirteen million, seven hundred twenty thousand, ninety-nine".