13820417 has 4 divisors (see below), whose sum is σ = 14883540. Its totient is φ = 12757296.

The previous prime is 13820407. The next prime is 13820431. The reversal of 13820417 is 71402831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71402831 = 89 ⋅802279.

It can be written as a sum of positive squares in 2 ways, for example, as 8976016 + 4844401 = 2996^2 + 2201^2 .

It is a cyclic number.

It is not a de Polignac number, because 13820417 - 2⁸ = 13820161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13820407) 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, 531542 + ... + 531567.

It is an arithmetic number, because the mean of its divisors is an integer number (3720885).

Almost surely, 2^13820417 is an apocalyptic number.

It is an amenable number.

13820417 is a deficient number, since it is larger than the sum of its proper divisors (1063123).

13820417 is a wasteful number, since it uses less digits than its factorization.

13820417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063122.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 13820417 is about 3717.5821443514. The cubic root of 13820417 is about 239.9792632546.

The spelling of 13820417 in words is "thirteen million, eight hundred twenty thousand, four hundred seventeen".