189552709 has 2 divisors, whose sum is σ = 189552710. Its totient is φ = 189552708.

The previous prime is 189552697. The next prime is 189552743. The reversal of 189552709 is 907255981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122722084 + 66830625 = 11078^2 + 8175^2 .

It is a cyclic number.

It is not a de Polignac number, because 189552709 - 2²¹ = 187455557 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189552409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94776354 + 94776355.

It is an arithmetic number, because the mean of its divisors is an integer number (94776355).

Almost surely, 2^189552709 is an apocalyptic number.

It is an amenable number.

189552709 is a deficient number, since it is larger than the sum of its proper divisors (1).

189552709 is an equidigital number, since it uses as much as digits as its factorization.

189552709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 226800, while the sum is 46.

The square root of 189552709 is about 13767.8142419194. The cubic root of 189552709 is about 574.4382253643.

The spelling of 189552709 in words is "one hundred eighty-nine million, five hundred fifty-two thousand, seven hundred nine".