69798193981 has 2 divisors, whose sum is σ = 69798193982. Its totient is φ = 69798193980.

The previous prime is 69798193891. The next prime is 69798193987. The reversal of 69798193981 is 18939189796.

Together with previous prime (69798193891) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59924592025 + 9873601956 = 244795^2 + 99366^2 .

It is a cyclic number.

It is not a de Polignac number, because 69798193981 - 2²¹ = 69796096829 is a prime.

It is a super-2 number, since 2×69798193981² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 69798193981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69798193987) 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, 34899096990 + 34899096991.

It is an arithmetic number, because the mean of its divisors is an integer number (34899096991).

Almost surely, 2^69798193981 is an apocalyptic number.

It is an amenable number.

69798193981 is a deficient number, since it is larger than the sum of its proper divisors (1).

69798193981 is an equidigital number, since it uses as much as digits as its factorization.

69798193981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52907904, while the sum is 70.

The spelling of 69798193981 in words is "sixty-nine billion, seven hundred ninety-eight million, one hundred ninety-three thousand, nine hundred eighty-one".