17212394491 has 2 divisors, whose sum is σ = 17212394492. Its totient is φ = 17212394490.

The previous prime is 17212394489. The next prime is 17212394497. The reversal of 17212394491 is 19449321271.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 17212394491 - 2¹ = 17212394489 is a prime.

It is a super-2 number, since 2×17212394491² (a number of 21 digits) contains 22 as substring.

Together with 17212394489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (17212394497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8606197245 + 8606197246.

It is an arithmetic number, because the mean of its divisors is an integer number (8606197246).

Almost surely, 2^17212394491 is an apocalyptic number.

17212394491 is a deficient number, since it is larger than the sum of its proper divisors (1).

17212394491 is an equidigital number, since it uses as much as digits as its factorization.

17212394491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 43.

The spelling of 17212394491 in words is "seventeen billion, two hundred twelve million, three hundred ninety-four thousand, four hundred ninety-one".