2989721537669 has 2 divisors, whose sum is σ = 2989721537670. Its totient is φ = 2989721537668.

The previous prime is 2989721537581. The next prime is 2989721537723. The reversal of 2989721537669 is 9667351279892.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2951998187044 + 37723350625 = 1718138^2 + 194225^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2989721537669 is a prime.

It is a super-2 number, since 2×2989721537669² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2989721537596 and 2989721537605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2989720537669) 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, 1494860768834 + 1494860768835.

It is an arithmetic number, because the mean of its divisors is an integer number (1494860768835).

Almost surely, 2^{2989721537669} is an apocalyptic number.

It is an amenable number.

2989721537669 is a deficient number, since it is larger than the sum of its proper divisors (1).

2989721537669 is an equidigital number, since it uses as much as digits as its factorization.

2989721537669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 617258880, while the sum is 74.

The spelling of 2989721537669 in words is "two trillion, nine hundred eighty-nine billion, seven hundred twenty-one million, five hundred thirty-seven thousand, six hundred sixty-nine".