189922797 has 18 divisors (see below), whose sum is σ = 279952686. Its totient is φ = 124029360.

The previous prime is 189922781. The next prime is 189922801. The reversal of 189922797 is 797229981.

It can be written as a sum of positive squares in only one way, i.e., 175589001 + 14333796 = 13251^2 + 3786^2 .

It is not a de Polignac number, because 189922797 - 2⁴ = 189922781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189922297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 300672 + ... + 301302.

It is an arithmetic number, because the mean of its divisors is an integer number (15552927).

Almost surely, 2^189922797 is an apocalyptic number.

It is an amenable number.

189922797 is a deficient number, since it is larger than the sum of its proper divisors (90029889).

189922797 is an frugal number, since it uses more digits than its factorization.

189922797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321 (or 687 counting only the distinct ones).

The product of its digits is 1143072, while the sum is 54.

The square root of 189922797 is about 13781.2480204080. The cubic root of 189922797 is about 574.8118320648.

The spelling of 189922797 in words is "one hundred eighty-nine million, nine hundred twenty-two thousand, seven hundred ninety-seven".