189154249 has 4 divisors (see below), whose sum is σ = 194266564. Its totient is φ = 184041936.

The previous prime is 189154237. The next prime is 189154267. The reversal of 189154249 is 942451981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 942451981 = 22129 ⋅42589.

It can be written as a sum of positive squares in 2 ways, for example, as 160478224 + 28676025 = 12668^2 + 5355^2 .

It is a cyclic number.

It is not a de Polignac number, because 189154249 - 2⁹ = 189153737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189154289) 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 3 ways as a sum of consecutive naturals, for example, 2556102 + ... + 2556175.

It is an arithmetic number, because the mean of its divisors is an integer number (48566641).

Almost surely, 2^189154249 is an apocalyptic number.

It is an amenable number.

189154249 is a deficient number, since it is larger than the sum of its proper divisors (5112315).

189154249 is an equidigital number, since it uses as much as digits as its factorization.

189154249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5112314.

The product of its digits is 103680, while the sum is 43.

The square root of 189154249 is about 13753.3359226044. The cubic root of 189154249 is about 574.0354328671.

The spelling of 189154249 in words is "one hundred eighty-nine million, one hundred fifty-four thousand, two hundred forty-nine".