698438550961 has 2 divisors, whose sum is σ = 698438550962. Its totient is φ = 698438550960.

The previous prime is 698438550949. The next prime is 698438550973. The reversal of 698438550961 is 169055834896.

It is a balanced prime because it is at equal distance from previous prime (698438550949) and next prime (698438550973).

It can be written as a sum of positive squares in only one way, i.e., 461129274225 + 237309276736 = 679065^2 + 487144^2 .

It is a cyclic number.

It is not a de Polignac number, because 698438550961 - 2⁷ = 698438550833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 698438550893 and 698438550902.

It is not a weakly prime, because it can be changed into another prime (698438550991) 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, 349219275480 + 349219275481.

It is an arithmetic number, because the mean of its divisors is an integer number (349219275481).

Almost surely, 2^698438550961 is an apocalyptic number.

It is an amenable number.

698438550961 is a deficient number, since it is larger than the sum of its proper divisors (1).

698438550961 is an equidigital number, since it uses as much as digits as its factorization.

698438550961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55987200, while the sum is 64.

The spelling of 698438550961 in words is "six hundred ninety-eight billion, four hundred thirty-eight million, five hundred fifty thousand, nine hundred sixty-one".