189276121 has 4 divisors (see below), whose sum is σ = 191150244. Its totient is φ = 187402000.

The previous prime is 189276083. The next prime is 189276133. The reversal of 189276121 is 121672981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121672981 = 6473 ⋅18797.

It can be written as a sum of positive squares in 2 ways, for example, as 148571721 + 40704400 = 12189^2 + 6380^2 .

It is a cyclic number.

It is not a de Polignac number, because 189276121 - 2¹⁷ = 189145049 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189276151) 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, 936910 + ... + 937111.

It is an arithmetic number, because the mean of its divisors is an integer number (47787561).

Almost surely, 2^189276121 is an apocalyptic number.

It is an amenable number.

189276121 is a deficient number, since it is larger than the sum of its proper divisors (1874123).

189276121 is a wasteful number, since it uses less digits than its factorization.

189276121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1874122.

The product of its digits is 12096, while the sum is 37.

The square root of 189276121 is about 13757.7658433337. The cubic root of 189276121 is about 574.1586899923.

The spelling of 189276121 in words is "one hundred eighty-nine million, two hundred seventy-six thousand, one hundred twenty-one".