217936097 has 2 divisors, whose sum is σ = 217936098. Its totient is φ = 217936096.

The previous prime is 217936093. The next prime is 217936111. The reversal of 217936097 is 790639712.

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., 205091041 + 12845056 = 14321^2 + 3584^2 .

It is a cyclic number.

It is not a de Polignac number, because 217936097 - 2² = 217936093 is a prime.

It is a super-2 number, since 2×217936097² = 94992284751186818, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (217936091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108968048 + 108968049.

It is an arithmetic number, because the mean of its divisors is an integer number (108968049).

Almost surely, 2^217936097 is an apocalyptic number.

It is an amenable number.

217936097 is a deficient number, since it is larger than the sum of its proper divisors (1).

217936097 is an equidigital number, since it uses as much as digits as its factorization.

217936097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 142884, while the sum is 44.

The square root of 217936097 is about 14762.6588729808. The cubic root of 217936097 is about 601.7873527374.

The spelling of 217936097 in words is "two hundred seventeen million, nine hundred thirty-six thousand, ninety-seven".