189678453 has 4 divisors (see below), whose sum is σ = 252904608. Its totient is φ = 126452300.

The previous prime is 189678431. The next prime is 189678479. The reversal of 189678453 is 354876981.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 354876981 = 3 ⋅118292327.

It is a cyclic number.

It is not a de Polignac number, because 189678453 - 2⁶ = 189678389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 189678396 and 189678405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189678403) 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, 31613073 + ... + 31613078.

It is an arithmetic number, because the mean of its divisors is an integer number (63226152).

Almost surely, 2^189678453 is an apocalyptic number.

It is an amenable number.

189678453 is a deficient number, since it is larger than the sum of its proper divisors (63226155).

189678453 is an equidigital number, since it uses as much as digits as its factorization.

189678453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63226154.

The product of its digits is 1451520, while the sum is 51.

The square root of 189678453 is about 13772.3800775320. The cubic root of 189678453 is about 574.5652194059.

The spelling of 189678453 in words is "one hundred eighty-nine million, six hundred seventy-eight thousand, four hundred fifty-three".