189178641 has 6 divisors (see below), whose sum is σ = 273258050. Its totient is φ = 126119088.

The previous prime is 189178621. The next prime is 189178651. The reversal of 189178641 is 146871981.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 162180225 + 26998416 = 12735^2 + 5196^2 .

It is not a de Polignac number, because 189178641 - 2¹¹ = 189176593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189178621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10509916 + ... + 10509933.

Almost surely, 2^189178641 is an apocalyptic number.

It is an amenable number.

189178641 is a deficient number, since it is larger than the sum of its proper divisors (84079409).

189178641 is a wasteful number, since it uses less digits than its factorization.

189178641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21019855 (or 21019852 counting only the distinct ones).

The product of its digits is 96768, while the sum is 45.

The square root of 189178641 is about 13754.2226606959. Note that the first 3 decimals coincide. The cubic root of 189178641 is about 574.0601063290.

The spelling of 189178641 in words is "one hundred eighty-nine million, one hundred seventy-eight thousand, six hundred forty-one".