189901297 has 4 divisors (see below), whose sum is σ = 190520176. Its totient is φ = 189282420.

The previous prime is 189901289. The next prime is 189901321. The reversal of 189901297 is 792109981.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 189901297 - 2³ = 189901289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189901277) 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, 308979 + ... + 309592.

It is an arithmetic number, because the mean of its divisors is an integer number (47630044).

Almost surely, 2^189901297 is an apocalyptic number.

It is an amenable number.

189901297 is a deficient number, since it is larger than the sum of its proper divisors (618879).

189901297 is an equidigital number, since it uses as much as digits as its factorization.

189901297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618878.

The product of its (nonzero) digits is 81648, while the sum is 46.

The square root of 189901297 is about 13780.4679528672. The cubic root of 189901297 is about 574.7901409339.

The spelling of 189901297 in words is "one hundred eighty-nine million, nine hundred one thousand, two hundred ninety-seven".