2097969742969 has 9 divisors (see below), whose sum is σ = 2138379197773. Its totient is φ = 2058310089472.

The previous prime is 2097969742867. The next prime is 2097969742993. The reversal of 2097969742969 is 9692479697902.

The square root of 2097969742969 is 1448437.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 87778875625 + 2010190867344 = 296275^2 + 1417812^2 .

It is not a de Polignac number, because 2097969742969 - 2²¹ = 2097967645817 is a prime.

It is a super-2 number, since 2×2097969742969² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2097969742369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 76753497 + ... + 76780825.

Almost surely, 2^{2097969742969} is an apocalyptic number.

2097969742969 is the 1448437-th square number.

2097969742969 is the 724219-th centered octagonal number.

It is an amenable number.

2097969742969 is a deficient number, since it is larger than the sum of its proper divisors (40409454804).

2097969742969 is an frugal number, since it uses more digits than its factorization.

2097969742969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54764 (or 27382 counting only the distinct ones).

The product of its (nonzero) digits is 1666598976, while the sum is 79.

The spelling of 2097969742969 in words is "two trillion, ninety-seven billion, nine hundred sixty-nine million, seven hundred forty-two thousand, nine hundred sixty-nine".