21714317 has 2 divisors, whose sum is σ = 21714318. Its totient is φ = 21714316.

The previous prime is 21714313. The next prime is 21714337. The reversal of 21714317 is 71341712.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20124196 + 1590121 = 4486^2 + 1261^2 .

It is a cyclic number.

It is not a de Polignac number, because 21714317 - 2² = 21714313 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21714313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10857158 + 10857159.

It is an arithmetic number, because the mean of its divisors is an integer number (10857159).

Almost surely, 2^21714317 is an apocalyptic number.

It is an amenable number.

21714317 is a deficient number, since it is larger than the sum of its proper divisors (1).

21714317 is an equidigital number, since it uses as much as digits as its factorization.

21714317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1176, while the sum is 26.

The square root of 21714317 is about 4659.8623370224. The cubic root of 21714317 is about 278.9857736951.

The spelling of 21714317 in words is "twenty-one million, seven hundred fourteen thousand, three hundred seventeen".