189406123 has 2 divisors, whose sum is σ = 189406124. Its totient is φ = 189406122.

The previous prime is 189406073. The next prime is 189406141. The reversal of 189406123 is 321604981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 189406123 - 2⁹ = 189405611 is a prime.

It is a super-2 number, since 2×189406123² = 71749358859782258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (189406423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94703061 + 94703062.

It is an arithmetic number, because the mean of its divisors is an integer number (94703062).

Almost surely, 2^189406123 is an apocalyptic number.

189406123 is a deficient number, since it is larger than the sum of its proper divisors (1).

189406123 is an equidigital number, since it uses as much as digits as its factorization.

189406123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 189406123 is about 13762.4897093513. The cubic root of 189406123 is about 574.2901112112.

The spelling of 189406123 in words is "one hundred eighty-nine million, four hundred six thousand, one hundred twenty-three".