698085881 has 2 divisors, whose sum is σ = 698085882. Its totient is φ = 698085880.

The previous prime is 698085827. The next prime is 698085887. The reversal of 698085881 is 188580896.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 481407481 + 216678400 = 21941^2 + 14720^2 .

It is a cyclic number.

It is not a de Polignac number, because 698085881 - 2¹⁰ = 698084857 is a prime.

It is a super-2 number, since 2×698085881² = 974647794503092322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (698085887) 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, 349042940 + 349042941.

It is an arithmetic number, because the mean of its divisors is an integer number (349042941).

Almost surely, 2^698085881 is an apocalyptic number.

It is an amenable number.

698085881 is a deficient number, since it is larger than the sum of its proper divisors (1).

698085881 is an equidigital number, since it uses as much as digits as its factorization.

698085881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1105920, while the sum is 53.

The square root of 698085881 is about 26421.3148991491. The cubic root of 698085881 is about 887.0939515541.

The spelling of 698085881 in words is "six hundred ninety-eight million, eighty-five thousand, eight hundred eighty-one".