189397451 has 12 divisors (see below), whose sum is σ = 196033992. Its totient is φ = 182957088.

The previous prime is 189397441. The next prime is 189397457. The reversal of 189397451 is 154793981.

It is not a de Polignac number, because 189397451 - 2¹⁸ = 189135307 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a junction number, because it is equal to n+sod(n) for n = 189397396 and 189397405.

It is not an unprimeable number, because it can be changed into a prime (189397457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 182831 + ... + 183863.

It is an arithmetic number, because the mean of its divisors is an integer number (16336166).

Almost surely, 2^189397451 is an apocalyptic number.

189397451 is a deficient number, since it is larger than the sum of its proper divisors (6636541).

189397451 is an equidigital number, since it uses as much as digits as its factorization.

189397451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1210 (or 1163 counting only the distinct ones).

The product of its digits is 272160, while the sum is 47.

The square root of 189397451 is about 13762.1746464721. The cubic root of 189397451 is about 574.2813464121.

The spelling of 189397451 in words is "one hundred eighty-nine million, three hundred ninety-seven thousand, four hundred fifty-one".