13720837 has 8 divisors (see below), whose sum is σ = 14805504. Its totient is φ = 12640368.

The previous prime is 13720823. The next prime is 13720841. The reversal of 13720837 is 73802731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13720837 - 2⁷ = 13720709 is a prime.

It is a super-2 number, since 2×13720837² = 376522735961138, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13720799 and 13720808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13720877) 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 7 ways as a sum of consecutive naturals, for example, 10608 + ... + 11830.

It is an arithmetic number, because the mean of its divisors is an integer number (1850688).

Almost surely, 2^13720837 is an apocalyptic number.

It is an amenable number.

13720837 is a deficient number, since it is larger than the sum of its proper divisors (1084667).

13720837 is a wasteful number, since it uses less digits than its factorization.

13720837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2099.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 13720837 is about 3704.1648181473. The cubic root of 13720837 is about 239.4015006326.

The spelling of 13720837 in words is "thirteen million, seven hundred twenty thousand, eight hundred thirty-seven".