17400839987 has 2 divisors, whose sum is σ = 17400839988. Its totient is φ = 17400839986.

The previous prime is 17400839933. The next prime is 17400840019. The reversal of 17400839987 is 78993800471.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 17400839987 - 2¹² = 17400835891 is a prime.

It is not a weakly prime, because it can be changed into another prime (17400839917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8700419993 + 8700419994.

It is an arithmetic number, because the mean of its divisors is an integer number (8700419994).

Almost surely, 2^17400839987 is an apocalyptic number.

17400839987 is a deficient number, since it is larger than the sum of its proper divisors (1).

17400839987 is an equidigital number, since it uses as much as digits as its factorization.

17400839987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3048192, while the sum is 56.

The spelling of 17400839987 in words is "seventeen billion, four hundred million, eight hundred thirty-nine thousand, nine hundred eighty-seven".