189454191 has 4 divisors (see below), whose sum is σ = 252605592. Its totient is φ = 126302792.

The previous prime is 189454189. The next prime is 189454217. The reversal of 189454191 is 191454981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 191454981 = 3 ⋅63818327.

It is a cyclic number.

It is not a de Polignac number, because 189454191 - 2¹ = 189454189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189453191) 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, 31575696 + ... + 31575701.

It is an arithmetic number, because the mean of its divisors is an integer number (63151398).

Almost surely, 2^189454191 is an apocalyptic number.

189454191 is a deficient number, since it is larger than the sum of its proper divisors (63151401).

189454191 is an equidigital number, since it uses as much as digits as its factorization.

189454191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63151400.

The product of its digits is 51840, while the sum is 42.

The square root of 189454191 is about 13764.2359395645. The cubic root of 189454191 is about 574.3386887365.

The spelling of 189454191 in words is "one hundred eighty-nine million, four hundred fifty-four thousand, one hundred ninety-one".