698881188869 has 2 divisors, whose sum is σ = 698881188870. Its totient is φ = 698881188868.

The previous prime is 698881188793. The next prime is 698881188919. The reversal of 698881188869 is 968881188896.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 517158024769 + 181723164100 = 719137^2 + 426290^2 .

It is a cyclic number.

It is not a de Polignac number, because 698881188869 - 2¹² = 698881184773 is a prime.

It is a super-2 number, since 2×698881188869² (a number of 24 digits) contains 22 as substring.

698881188869 is a strobogrammatic number because it is the same when read upside-down.

It is a junction number, because it is equal to n+sod(n) for n = 698881188793 and 698881188802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (698881188169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349440594434 + 349440594435.

It is an arithmetic number, because the mean of its divisors is an integer number (349440594435).

Almost surely, 2^698881188869 is an apocalyptic number.

It is an amenable number.

698881188869 is a deficient number, since it is larger than the sum of its proper divisors (1).

698881188869 is an equidigital number, since it uses as much as digits as its factorization.

698881188869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 764411904, while the sum is 80.

The spelling of 698881188869 in words is "six hundred ninety-eight billion, eight hundred eighty-one million, one hundred eighty-eight thousand, eight hundred sixty-nine".