189724741 has 4 divisors (see below), whose sum is σ = 192126400. Its totient is φ = 187323084.

The previous prime is 189724739. The next prime is 189724819. The reversal of 189724741 is 147427981.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 189724741 - 2¹ = 189724739 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189724441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1200711 + ... + 1200868.

It is an arithmetic number, because the mean of its divisors is an integer number (48031600).

Almost surely, 2^189724741 is an apocalyptic number.

It is an amenable number.

189724741 is a deficient number, since it is larger than the sum of its proper divisors (2401659).

189724741 is an equidigital number, since it uses as much as digits as its factorization.

189724741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2401658.

The product of its digits is 112896, while the sum is 43.

The square root of 189724741 is about 13774.0604398267. The cubic root of 189724741 is about 574.6119534293.

The spelling of 189724741 in words is "one hundred eighty-nine million, seven hundred twenty-four thousand, seven hundred forty-one".