698000861 has 2 divisors, whose sum is σ = 698000862. Its totient is φ = 698000860.

The previous prime is 698000843. The next prime is 698000869. The reversal of 698000861 is 168000896.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 535922500 + 162078361 = 23150^2 + 12731^2 .

It is a cyclic number.

It is not a de Polignac number, because 698000861 - 2²⁶ = 630891997 is a prime.

It is equal to p_36154856 and since 698000861 and 36154856 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (698000869) 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, 349000430 + 349000431.

It is an arithmetic number, because the mean of its divisors is an integer number (349000431).

Almost surely, 2^698000861 is an apocalyptic number.

It is an amenable number.

698000861 is a deficient number, since it is larger than the sum of its proper divisors (1).

698000861 is an equidigital number, since it uses as much as digits as its factorization.

698000861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 698000861 is about 26419.7059219061. The cubic root of 698000861 is about 887.0579369835.

The spelling of 698000861 in words is "six hundred ninety-eight million, eight hundred sixty-one", and thus it is an aban number.