189834317 has 2 divisors, whose sum is σ = 189834318. Its totient is φ = 189834316.

The previous prime is 189834313. The next prime is 189834343. The reversal of 189834317 is 713438981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 142898116 + 46936201 = 11954^2 + 6851^2 .

It is a cyclic number.

It is not a de Polignac number, because 189834317 - 2² = 189834313 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189834311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94917158 + 94917159.

It is an arithmetic number, because the mean of its divisors is an integer number (94917159).

Almost surely, 2^189834317 is an apocalyptic number.

It is an amenable number.

189834317 is a deficient number, since it is larger than the sum of its proper divisors (1).

189834317 is an equidigital number, since it uses as much as digits as its factorization.

189834317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 44.

The square root of 189834317 is about 13778.0374872476. The cubic root of 189834317 is about 574.7225549976.

The spelling of 189834317 in words is "one hundred eighty-nine million, eight hundred thirty-four thousand, three hundred seventeen".