189849847 has 10 divisors (see below), whose sum is σ = 208849640. Its totient is φ = 172577460.

The previous prime is 189849833. The next prime is 189849851. The reversal of 189849847 is 748948981.

It is not a de Polignac number, because 189849847 - 2¹⁵ = 189817079 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 189849791 and 189849800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189849827) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 8158 + ... + 21124.

It is an arithmetic number, because the mean of its divisors is an integer number (20884964).

Almost surely, 2^189849847 is an apocalyptic number.

189849847 is a deficient number, since it is larger than the sum of its proper divisors (18999793).

189849847 is an frugal number, since it uses more digits than its factorization.

189849847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13011 (or 12978 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 58.

The square root of 189849847 is about 13778.6010538080. The cubic root of 189849847 is about 574.7382269057.

The spelling of 189849847 in words is "one hundred eighty-nine million, eight hundred forty-nine thousand, eight hundred forty-seven".