13620717 has 20 divisors (see below), whose sum is σ = 22198176. Its totient is φ = 8254440.

The previous prime is 13620713. The next prime is 13620721. The reversal of 13620717 is 71702631.

It is an interprime number because it is at equal distance from previous prime (13620713) and next prime (13620721).

It is not a de Polignac number, because 13620717 - 2² = 13620713 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13620713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6753 + ... + 8534.

Almost surely, 2^13620717 is an apocalyptic number.

It is an amenable number.

13620717 is a deficient number, since it is larger than the sum of its proper divisors (8577459).

13620717 is a wasteful number, since it uses less digits than its factorization.

13620717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15310 (or 15301 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 27.

The square root of 13620717 is about 3690.6255567315. The cubic root of 13620717 is about 238.8177797928.

The spelling of 13620717 in words is "thirteen million, six hundred twenty thousand, seven hundred seventeen".