189527749 has 4 divisors (see below), whose sum is σ = 189591820. Its totient is φ = 189463680.

The previous prime is 189527729. The next prime is 189527771. The reversal of 189527749 is 947725981.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11492100 + 178035649 = 3390^2 + 13343^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189527749 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 189527696 and 189527705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189527729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27372 + ... + 33589.

It is an arithmetic number, because the mean of its divisors is an integer number (47397955).

Almost surely, 2^189527749 is an apocalyptic number.

It is an amenable number.

189527749 is a deficient number, since it is larger than the sum of its proper divisors (64071).

189527749 is an equidigital number, since it uses as much as digits as its factorization.

189527749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64070.

The product of its digits is 1270080, while the sum is 52.

The square root of 189527749 is about 13766.9077501086. The cubic root of 189527749 is about 574.4130105528.

The spelling of 189527749 in words is "one hundred eighty-nine million, five hundred twenty-seven thousand, seven hundred forty-nine".