2039221128169 has 3 divisors (see below), whose sum is σ = 2039222556183. Its totient is φ = 2039219700156.

The previous prime is 2039221128151. The next prime is 2039221128253. The reversal of 2039221128169 is 9618211229302.

The square root of 2039221128169 is 1428013.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1931891505625 + 107329622544 = 1389925^2 + 327612^2 .

It is not a de Polignac number, because 2039221128169 - 2¹³ = 2039221119977 is a prime.

It is a super-5 number, since 5×2039221128169⁵ (a number of 63 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2039221128569) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 714007 + ... + 2142019.

It is an arithmetic number, because the mean of its divisors is an integer number (679740852061).

Almost surely, 2^{2039221128169} is an apocalyptic number.

2039221128169 is the 1428013-rd square number.

2039221128169 is the 714007-th centered octagonal number.

It is an amenable number.

2039221128169 is a deficient number, since it is larger than the sum of its proper divisors (1428014).

2039221128169 is an frugal number, since it uses more digits than its factorization.

2039221128169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2856026 (or 1428013 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 46.

The spelling of 2039221128169 in words is "two trillion, thirty-nine billion, two hundred twenty-one million, one hundred twenty-eight thousand, one hundred sixty-nine".