189689653 has 2 divisors, whose sum is σ = 189689654. Its totient is φ = 189689652.

The previous prime is 189689627. The next prime is 189689681. The reversal of 189689653 is 356986981.

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., 189145009 + 544644 = 13753^2 + 738^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189689653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 189689594 and 189689603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189689623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94844826 + 94844827.

It is an arithmetic number, because the mean of its divisors is an integer number (94844827).

Almost surely, 2^189689653 is an apocalyptic number.

It is an amenable number.

189689653 is a deficient number, since it is larger than the sum of its proper divisors (1).

189689653 is an equidigital number, since it uses as much as digits as its factorization.

189689653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2799360, while the sum is 55.

The square root of 189689653 is about 13772.7866824401. The cubic root of 189689653 is about 574.5765280245.

The spelling of 189689653 in words is "one hundred eighty-nine million, six hundred eighty-nine thousand, six hundred fifty-three".