189747361 has 2 divisors, whose sum is σ = 189747362. Its totient is φ = 189747360.

The previous prime is 189747317. The next prime is 189747403. The reversal of 189747361 is 163747981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149817600 + 39929761 = 12240^2 + 6319^2 .

It is an emirp because it is prime and its reverse (163747981) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189747361 is a prime.

It is a super-2 number, since 2×189747361² = 72008122012928642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (189747161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94873680 + 94873681.

It is an arithmetic number, because the mean of its divisors is an integer number (94873681).

Almost surely, 2^189747361 is an apocalyptic number.

It is an amenable number.

189747361 is a deficient number, since it is larger than the sum of its proper divisors (1).

189747361 is an equidigital number, since it uses as much as digits as its factorization.

189747361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 46.

The square root of 189747361 is about 13774.8815239914. The cubic root of 189747361 is about 574.6347886269.

It can be divided in two parts, 18974 and 7361, that added together give a triangular number (26335 = T₂₂₉).

The spelling of 189747361 in words is "one hundred eighty-nine million, seven hundred forty-seven thousand, three hundred sixty-one".