189424791 has 8 divisors (see below), whose sum is σ = 280629360. Its totient is φ = 126283176.

The previous prime is 189424789. The next prime is 189424799. The reversal of 189424791 is 197424981.

It is a happy number.

189424791 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 189424791 - 2¹ = 189424789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189424799) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3507840 + ... + 3507893.

It is an arithmetic number, because the mean of its divisors is an integer number (35078670).

Almost surely, 2^189424791 is an apocalyptic number.

189424791 is a deficient number, since it is larger than the sum of its proper divisors (91204569).

189424791 is an equidigital number, since it uses as much as digits as its factorization.

189424791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7015742 (or 7015736 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 189424791 is about 13763.1679129479. The cubic root of 189424791 is about 574.3089780698.

The spelling of 189424791 in words is "one hundred eighty-nine million, four hundred twenty-four thousand, seven hundred ninety-one".