189451 has 4 divisors (see below), whose sum is σ = 197712. Its totient is φ = 181192.

The previous prime is 189439. The next prime is 189463. The reversal of 189451 is 154981.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (189439) and next prime (189463).

It is a cyclic number.

It is not a de Polignac number, because 189451 - 2⁹ = 188939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189401) 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, 4096 + ... + 4141.

It is an arithmetic number, because the mean of its divisors is an integer number (49428).

2¹⁸⁹⁴⁵¹ is an apocalyptic number.

189451 is a deficient number, since it is larger than the sum of its proper divisors (8261).

189451 is an equidigital number, since it uses as much as digits as its factorization.

189451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8260.

The product of its digits is 1440, while the sum is 28.

The square root of 189451 is about 435.2596925974. The cubic root of 189451 is about 57.4335464166.

The spelling of 189451 in words is "one hundred eighty-nine thousand, four hundred fifty-one".