189012251 has 4 divisors (see below), whose sum is σ = 189095400. Its totient is φ = 188929104.

The previous prime is 189012217. The next prime is 189012253. The reversal of 189012251 is 152210981.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189012251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189012253) 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, 38066 + ... + 42743.

It is an arithmetic number, because the mean of its divisors is an integer number (47273850).

Almost surely, 2^189012251 is an apocalyptic number.

189012251 is a deficient number, since it is larger than the sum of its proper divisors (83149).

189012251 is an equidigital number, since it uses as much as digits as its factorization.

189012251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83148.

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 189012251 is about 13748.1726422096. The cubic root of 189012251 is about 573.8917542040.

It can be divided in two parts, 1890 and 12251, that added together give a palindrome (14141).

The spelling of 189012251 in words is "one hundred eighty-nine million, twelve thousand, two hundred fifty-one".