189365121 has 45 divisors (see below), whose sum is σ = 313185873. Its totient is φ = 113941080.

The previous prime is 189365119. The next prime is 189365123. The reversal of 189365121 is 121563981.

The square root of 189365121 is 13761.

It is a perfect power (a square), and thus also a powerful number.

189365121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (189365119) and next prime (189365123).

It is not a de Polignac number, because 189365121 - 2¹ = 189365119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (189365123) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 1362270 + ... + 1362408.

Almost surely, 2^189365121 is an apocalyptic number.

189365121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

189365121 is the 13761-st square number.

189365121 is the 6881-st centered octagonal number.

It is an amenable number.

189365121 is a deficient number, since it is larger than the sum of its proper divisors (123820752).

189365121 is an equidigital number, since it uses as much as digits as its factorization.

189365121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312 (or 153 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The cubic root of 189365121 is about 574.2486680905.

Multiplying 189365121 by its sum of digits (36), we get a square (6817144356 = 82566²).

The spelling of 189365121 in words is "one hundred eighty-nine million, three hundred sixty-five thousand, one hundred twenty-one".