698718384869 has 2 divisors, whose sum is σ = 698718384870. Its totient is φ = 698718384868.

The previous prime is 698718384797. The next prime is 698718384877. The reversal of 698718384869 is 968483817896.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 602078227969 + 96640156900 = 775937^2 + 310870^2 .

It is a cyclic number.

It is not a de Polignac number, because 698718384869 - 2³² = 694423417573 is a prime.

It is a super-2 number, since 2×698718384869² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 698718384869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (698718384269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349359192434 + 349359192435.

It is an arithmetic number, because the mean of its divisors is an integer number (349359192435).

Almost surely, 2^698718384869 is an apocalyptic number.

It is an amenable number.

698718384869 is a deficient number, since it is larger than the sum of its proper divisors (1).

698718384869 is an equidigital number, since it uses as much as digits as its factorization.

698718384869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1003290624, while the sum is 77.

The spelling of 698718384869 in words is "six hundred ninety-eight billion, seven hundred eighteen million, three hundred eighty-four thousand, eight hundred sixty-nine".