147989669 has 2 divisors, whose sum is σ = 147989670. Its totient is φ = 147989668.

The previous prime is 147989609. The next prime is 147989683. The reversal of 147989669 is 966989741.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100200100 + 47789569 = 10010^2 + 6913^2 .

It is an emirp because it is prime and its reverse (966989741) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-147989669 is a prime.

It is a super-3 number, since 3×147989669³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (147989609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73994834 + 73994835.

It is an arithmetic number, because the mean of its divisors is an integer number (73994835).

Almost surely, 2^147989669 is an apocalyptic number.

It is an amenable number.

147989669 is a deficient number, since it is larger than the sum of its proper divisors (1).

147989669 is an equidigital number, since it uses as much as digits as its factorization.

147989669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5878656, while the sum is 59.

The square root of 147989669 is about 12165.1004517020. The cubic root of 147989669 is about 528.9449391963.

The spelling of 147989669 in words is "one hundred forty-seven million, nine hundred eighty-nine thousand, six hundred sixty-nine".