13720499 has 4 divisors (see below), whose sum is σ = 14775936.
Its totient is φ = 12665064.
The previous prime is 13720493. The next prime is 13720501. The reversal of 13720499 is 99402731.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99402731 = 421 ⋅236111.
It is a cyclic number.
It is not a de Polignac number, because 13720499 - 212 = 13716403 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (13720493) 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, 527699 + ... + 527724.
It is an arithmetic number, because the mean of its divisors is an integer number (3693984).
Almost surely, 213720499 is an apocalyptic number.
13720499 is a deficient number, since it is larger than the sum of its proper divisors (1055437).
13720499 is a wasteful number, since it uses less digits than its factorization.
13720499 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1055436.
The product of its (nonzero) digits is 13608, while the sum is 35.
The square root of 13720499 is about 3704.1191935466.
The cubic root of 13720499 is about 239.3995348057.
The spelling of 13720499 in words is "thirteen million, seven hundred twenty thousand, four hundred ninety-nine".