189031331 has 2 divisors, whose sum is σ = 189031332. Its totient is φ = 189031330.

The previous prime is 189031301. The next prime is 189031379. The reversal of 189031331 is 133130981.

It is a weak prime.

It is an emirp because it is prime and its reverse (133130981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189031331 - 2⁶ = 189031267 is a prime.

It is a super-2 number, since 2×189031331² = 71465688199263122, which contains 22 as substring.

It is a Chen prime.

It is equal to p_10504595 and since 189031331 and 10504595 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 189031294 and 189031303.

It is not a weakly prime, because it can be changed into another prime (189031301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94515665 + 94515666.

It is an arithmetic number, because the mean of its divisors is an integer number (94515666).

Almost surely, 2^189031331 is an apocalyptic number.

189031331 is a deficient number, since it is larger than the sum of its proper divisors (1).

189031331 is an equidigital number, since it uses as much as digits as its factorization.

189031331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 189031331 is about 13748.8665351003. The cubic root of 189031331 is about 573.9110642155.

The spelling of 189031331 in words is "one hundred eighty-nine million, thirty-one thousand, three hundred thirty-one".