189307553 has 2 divisors, whose sum is σ = 189307554. Its totient is φ = 189307552.

The previous prime is 189307519. The next prime is 189307579. The reversal of 189307553 is 355703981.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179372449 + 9935104 = 13393^2 + 3152^2 .

It is a cyclic number.

It is not a de Polignac number, because 189307553 - 2¹⁰ = 189306529 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 189307553.

It is not a weakly prime, because it can be changed into another prime (189307453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94653776 + 94653777.

It is an arithmetic number, because the mean of its divisors is an integer number (94653777).

Almost surely, 2^189307553 is an apocalyptic number.

It is an amenable number.

189307553 is a deficient number, since it is larger than the sum of its proper divisors (1).

189307553 is an equidigital number, since it uses as much as digits as its factorization.

189307553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 113400, while the sum is 41.

The square root of 189307553 is about 13758.9081325518. The cubic root of 189307553 is about 574.1904706469.

The spelling of 189307553 in words is "one hundred eighty-nine million, three hundred seven thousand, five hundred fifty-three".