1698989898971 has 2 divisors, whose sum is σ = 1698989898972. Its totient is φ = 1698989898970.

The previous prime is 1698989898869. The next prime is 1698989898979. The reversal of 1698989898971 is 1798989898961.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1698989898971 is a prime.

It is not a weakly prime, because it can be changed into another prime (1698989898979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 849494949485 + 849494949486.

It is an arithmetic number, because the mean of its divisors is an integer number (849494949486).

Almost surely, 2^{1698989898971} is an apocalyptic number.

1698989898971 is a deficient number, since it is larger than the sum of its proper divisors (1).

1698989898971 is an equidigital number, since it uses as much as digits as its factorization.

1698989898971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10158317568, while the sum is 92.

The spelling of 1698989898971 in words is "one trillion, six hundred ninety-eight billion, nine hundred eighty-nine million, eight hundred ninety-eight thousand, nine hundred seventy-one".