189376997 has 2 divisors, whose sum is σ = 189376998. Its totient is φ = 189376996.

The previous prime is 189376981. The next prime is 189377021. The reversal of 189376997 is 799673981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161010721 + 28366276 = 12689^2 + 5326^2 .

It is an emirp because it is prime and its reverse (799673981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189376997 - 2⁴ = 189376981 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189370997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94688498 + 94688499.

It is an arithmetic number, because the mean of its divisors is an integer number (94688499).

Almost surely, 2^189376997 is an apocalyptic number.

It is an amenable number.

189376997 is a deficient number, since it is larger than the sum of its proper divisors (1).

189376997 is an equidigital number, since it uses as much as digits as its factorization.

189376997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5143824, while the sum is 59.

The square root of 189376997 is about 13761.4315025727. The cubic root of 189376997 is about 574.2606724740.

The spelling of 189376997 in words is "one hundred eighty-nine million, three hundred seventy-six thousand, nine hundred ninety-seven".