217930382629 has 2 divisors, whose sum is σ = 217930382630. Its totient is φ = 217930382628.

The previous prime is 217930382569. The next prime is 217930382653. The reversal of 217930382629 is 926283039712.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 211908312225 + 6022070404 = 460335^2 + 77602^2 .

It is a cyclic number.

It is not a de Polignac number, because 217930382629 - 2³⁵ = 183570644261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (217930382699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108965191314 + 108965191315.

It is an arithmetic number, because the mean of its divisors is an integer number (108965191315).

Almost surely, 2^217930382629 is an apocalyptic number.

It is an amenable number.

217930382629 is a deficient number, since it is larger than the sum of its proper divisors (1).

217930382629 is an equidigital number, since it uses as much as digits as its factorization.

217930382629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1959552, while the sum is 52.

The spelling of 217930382629 in words is "two hundred seventeen billion, nine hundred thirty million, three hundred eighty-two thousand, six hundred twenty-nine".