189647069 has 2 divisors, whose sum is σ = 189647070. Its totient is φ = 189647068.

The previous prime is 189647039. The next prime is 189647083. The reversal of 189647069 is 960746981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132825625 + 56821444 = 11525^2 + 7538^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189647069 is a prime.

It is a super-2 number, since 2×189647069² = 71932021560581522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189647039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94823534 + 94823535.

It is an arithmetic number, because the mean of its divisors is an integer number (94823535).

Almost surely, 2^189647069 is an apocalyptic number.

It is an amenable number.

189647069 is a deficient number, since it is larger than the sum of its proper divisors (1).

189647069 is an equidigital number, since it uses as much as digits as its factorization.

189647069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 189647069 is about 13771.2406485400. The cubic root of 189647069 is about 574.5335286697.

The spelling of 189647069 in words is "one hundred eighty-nine million, six hundred forty-seven thousand, sixty-nine".