189123969 has 8 divisors (see below), whose sum is σ = 256439520. Its totient is φ = 123945536.

The previous prime is 189123953. The next prime is 189123971. The reversal of 189123969 is 969321981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 189123969 - 2⁴ = 189123953 is a prime.

It is a super-2 number, since 2×189123969² = 71535751300625922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (189123989) 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 in 7 ways as a sum of consecutive naturals, for example, 534072 + ... + 534425.

It is an arithmetic number, because the mean of its divisors is an integer number (32054940).

Almost surely, 2^189123969 is an apocalyptic number.

It is an amenable number.

189123969 is a deficient number, since it is larger than the sum of its proper divisors (67315551).

189123969 is a wasteful number, since it uses less digits than its factorization.

189123969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1068559.

The product of its digits is 209952, while the sum is 48.

The square root of 189123969 is about 13752.2350547102. The cubic root of 189123969 is about 574.0048005118.

The spelling of 189123969 in words is "one hundred eighty-nine million, one hundred twenty-three thousand, nine hundred sixty-nine".