189219907 has 4 divisors (see below), whose sum is σ = 189536400. Its totient is φ = 188903416.

The previous prime is 189219893. The next prime is 189219913. The reversal of 189219907 is 709912981.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 189219907 - 2¹¹ = 189217859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189219007) 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, 157348 + ... + 158545.

It is an arithmetic number, because the mean of its divisors is an integer number (47384100).

Almost surely, 2^189219907 is an apocalyptic number.

189219907 is a deficient number, since it is larger than the sum of its proper divisors (316493).

189219907 is an equidigital number, since it uses as much as digits as its factorization.

189219907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316492.

The product of its (nonzero) digits is 81648, while the sum is 46.

The square root of 189219907 is about 13755.7227000256. The cubic root of 189219907 is about 574.1018436731.

The spelling of 189219907 in words is "one hundred eighty-nine million, two hundred nineteen thousand, nine hundred seven".