189747317 has 2 divisors, whose sum is σ = 189747318. Its totient is φ = 189747316.

The previous prime is 189747293. The next prime is 189747361. The reversal of 189747317 is 713747981.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141110641 + 48636676 = 11879^2 + 6974^2 .

It is an emirp because it is prime and its reverse (713747981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189747317 - 2²² = 185553013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189347317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94873658 + 94873659.

It is an arithmetic number, because the mean of its divisors is an integer number (94873659).

Almost surely, 2^189747317 is an apocalyptic number.

It is an amenable number.

189747317 is a deficient number, since it is larger than the sum of its proper divisors (1).

189747317 is an equidigital number, since it uses as much as digits as its factorization.

189747317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 296352, while the sum is 47.

The square root of 189747317 is about 13774.8799268814. The cubic root of 189747317 is about 574.6347442101.

The spelling of 189747317 in words is "one hundred eighty-nine million, seven hundred forty-seven thousand, three hundred seventeen".