189307449 has 14 divisors (see below), whose sum is σ = 283832426. Its totient is φ = 126204480.

The previous prime is 189307441. The next prime is 189307453. The reversal of 189307449 is 944703981.

It can be written as a sum of positive squares in only one way, i.e., 107495424 + 81812025 = 10368^2 + 9045^2 .

It is not a de Polignac number, because 189307449 - 2³ = 189307441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189307441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 129112 + ... + 130569.

Almost surely, 2^189307449 is an apocalyptic number.

It is an amenable number.

189307449 is a deficient number, since it is larger than the sum of its proper divisors (94524977).

189307449 is an frugal number, since it uses more digits than its factorization.

189307449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259699 (or 259684 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 189307449 is about 13758.9043531816. The cubic root of 189307449 is about 574.1903654991.

The spelling of 189307449 in words is "one hundred eighty-nine million, three hundred seven thousand, four hundred forty-nine".