1889297025197 has 4 divisors (see below), whose sum is σ = 1889300893116. Its totient is φ = 1889293157280.

The previous prime is 1889297025181. The next prime is 1889297025233. The reversal of 1889297025197 is 7915207929881.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 327749380036 + 1561547645161 = 572494^2 + 1249619^2 .

It is a cyclic number.

It is not a de Polignac number, because 1889297025197 - 2⁴ = 1889297025181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1889297025797) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1073738 + ... + 2220699.

It is an arithmetic number, because the mean of its divisors is an integer number (472325223279).

Almost surely, 2^{1889297025197} is an apocalyptic number.

It is an amenable number.

1889297025197 is a deficient number, since it is larger than the sum of its proper divisors (3867919).

1889297025197 is an equidigital number, since it uses as much as digits as its factorization.

1889297025197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3867918.

The product of its (nonzero) digits is 45722880, while the sum is 68.

The spelling of 1889297025197 in words is "one trillion, eight hundred eighty-nine billion, two hundred ninety-seven million, twenty-five thousand, one hundred ninety-seven".