189648769 has 2 divisors, whose sum is σ = 189648770. Its totient is φ = 189648768.

The previous prime is 189648763. The next prime is 189648803. The reversal of 189648769 is 967846981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 176544369 + 13104400 = 13287^2 + 3620^2 .

It is a cyclic number.

It is not a de Polignac number, because 189648769 - 2²⁷ = 55431041 is a prime.

It is a super-2 number, since 2×189648769² = 71933311166430722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (189648763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94824384 + 94824385.

It is an arithmetic number, because the mean of its divisors is an integer number (94824385).

Almost surely, 2^189648769 is an apocalyptic number.

It is an amenable number.

189648769 is a deficient number, since it is larger than the sum of its proper divisors (1).

189648769 is an equidigital number, since it uses as much as digits as its factorization.

189648769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5225472, while the sum is 58.

The square root of 189648769 is about 13771.3023712356. The cubic root of 189648769 is about 574.5352453745.

The spelling of 189648769 in words is "one hundred eighty-nine million, six hundred forty-eight thousand, seven hundred sixty-nine".