17906428249 has 2 divisors, whose sum is σ = 17906428250. Its totient is φ = 17906428248.

The previous prime is 17906428237. The next prime is 17906428313. The reversal of 17906428249 is 94282460971.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17397610000 + 508818249 = 131900^2 + 22557^2 .

It is a cyclic number.

It is not a de Polignac number, because 17906428249 - 2³³ = 9316493657 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 17906428196 and 17906428205.

It is not a weakly prime, because it can be changed into another prime (17906422249) 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, 8953214124 + 8953214125.

It is an arithmetic number, because the mean of its divisors is an integer number (8953214125).

Almost surely, 2^17906428249 is an apocalyptic number.

It is an amenable number.

17906428249 is a deficient number, since it is larger than the sum of its proper divisors (1).

17906428249 is an equidigital number, since it uses as much as digits as its factorization.

17906428249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1741824, while the sum is 52.

The spelling of 17906428249 in words is "seventeen billion, nine hundred six million, four hundred twenty-eight thousand, two hundred forty-nine".