13858217 has 2 divisors, whose sum is σ = 13858218. Its totient is φ = 13858216.

The previous prime is 13858193. The next prime is 13858219. The reversal of 13858217 is 71285831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11909401 + 1948816 = 3451^2 + 1396^2 .

It is an emirp because it is prime and its reverse (71285831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13858217 - 2¹² = 13854121 is a prime.

Together with 13858219, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13858219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6929108 + 6929109.

It is an arithmetic number, because the mean of its divisors is an integer number (6929109).

Almost surely, 2^13858217 is an apocalyptic number.

It is an amenable number.

13858217 is a deficient number, since it is larger than the sum of its proper divisors (1).

13858217 is an equidigital number, since it uses as much as digits as its factorization.

13858217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 35.

The square root of 13858217 is about 3722.6626223713. The cubic root of 13858217 is about 240.1978518958.

The spelling of 13858217 in words is "thirteen million, eight hundred fifty-eight thousand, two hundred seventeen".