189520489 has 2 divisors, whose sum is σ = 189520490. Its totient is φ = 189520488.

The previous prime is 189520439. The next prime is 189520511. The reversal of 189520489 is 984025981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106254864 + 83265625 = 10308^2 + 9125^2 .

It is a cyclic number.

It is not a de Polignac number, because 189520489 - 2⁷ = 189520361 is a prime.

It is not a weakly prime, because it can be changed into another prime (189520439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94760244 + 94760245.

It is an arithmetic number, because the mean of its divisors is an integer number (94760245).

Almost surely, 2^189520489 is an apocalyptic number.

It is an amenable number.

189520489 is a deficient number, since it is larger than the sum of its proper divisors (1).

189520489 is an equidigital number, since it uses as much as digits as its factorization.

189520489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 46.

The square root of 189520489 is about 13766.6440718136. The cubic root of 189520489 is about 574.4056760214.

The spelling of 189520489 in words is "one hundred eighty-nine million, five hundred twenty thousand, four hundred eighty-nine".