6948218989 has 2 divisors, whose sum is σ = 6948218990. Its totient is φ = 6948218988.

The previous prime is 6948218951. The next prime is 6948219001. The reversal of 6948218989 is 9898128496.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4261870089 + 2686348900 = 65283^2 + 51830^2 .

It is a cyclic number.

It is not a de Polignac number, because 6948218989 - 2²¹ = 6946121837 is a prime.

It is a super-3 number, since 3×6948218989³ (a number of 31 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6948218989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6948218939) 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, 3474109494 + 3474109495.

It is an arithmetic number, because the mean of its divisors is an integer number (3474109495).

Almost surely, 2^6948218989 is an apocalyptic number.

It is an amenable number.

6948218989 is a deficient number, since it is larger than the sum of its proper divisors (1).

6948218989 is an equidigital number, since it uses as much as digits as its factorization.

6948218989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17915904, while the sum is 64.

The square root of 6948218989 is about 83355.9775241104. The cubic root of 6948218989 is about 1908.2026703077.

The spelling of 6948218989 in words is "six billion, nine hundred forty-eight million, two hundred eighteen thousand, nine hundred eighty-nine".