17948430089 has 2 divisors, whose sum is σ = 17948430090. Its totient is φ = 17948430088.

The previous prime is 17948430053. The next prime is 17948430091. The reversal of 17948430089 is 98003484971.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16343065600 + 1605364489 = 127840^2 + 40067^2 .

It is a cyclic number.

It is not a de Polignac number, because 17948430089 - 2⁸ = 17948429833 is a prime.

It is a super-2 number, since 2×17948430089² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

Together with 17948430091, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 17948430089.

It is not a weakly prime, because it can be changed into another prime (17948330089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8974215044 + 8974215045.

It is an arithmetic number, because the mean of its divisors is an integer number (8974215045).

Almost surely, 2^17948430089 is an apocalyptic number.

It is an amenable number.

17948430089 is a deficient number, since it is larger than the sum of its proper divisors (1).

17948430089 is an equidigital number, since it uses as much as digits as its factorization.

17948430089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1741824, while the sum is 53.

The spelling of 17948430089 in words is "seventeen billion, nine hundred forty-eight million, four hundred thirty thousand, eighty-nine".