189837361897 has 4 divisors (see below), whose sum is σ = 201004265556. Its totient is φ = 178670458240.

The previous prime is 189837361853. The next prime is 189837361927. The reversal of 189837361897 is 798163738981.

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 69746697216 + 120090664681 = 264096^2 + 346541^2 .

It is a cyclic number.

It is not a de Polignac number, because 189837361897 - 2²³ = 189828973289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189837361807) 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, 5583451804 + ... + 5583451837.

It is an arithmetic number, because the mean of its divisors is an integer number (50251066389).

Almost surely, 2^189837361897 is an apocalyptic number.

189837361897 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

189837361897 is a deficient number, since it is larger than the sum of its proper divisors (11166903659).

189837361897 is a wasteful number, since it uses less digits than its factorization.

189837361897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11166903658.

The product of its digits is 109734912, while the sum is 70.

The spelling of 189837361897 in words is "one hundred eighty-nine billion, eight hundred thirty-seven million, three hundred sixty-one thousand, eight hundred ninety-seven".