189473391 has 8 divisors (see below), whose sum is σ = 280701360. Its totient is φ = 126315576.

The previous prime is 189473321. The next prime is 189473413. The reversal of 189473391 is 193374981.

It is not a de Polignac number, because 189473391 - 2¹⁴ = 189457007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189473321) 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, 3508740 + ... + 3508793.

It is an arithmetic number, because the mean of its divisors is an integer number (35087670).

Almost surely, 2^189473391 is an apocalyptic number.

189473391 is a deficient number, since it is larger than the sum of its proper divisors (91227969).

189473391 is an equidigital number, since it uses as much as digits as its factorization.

189473391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7017542 (or 7017536 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 189473391 is about 13764.9333816041. The cubic root of 189473391 is about 574.3580899618.

The spelling of 189473391 in words is "one hundred eighty-nine million, four hundred seventy-three thousand, three hundred ninety-one".