189123619 has 2 divisors, whose sum is σ = 189123620. Its totient is φ = 189123618.

The previous prime is 189123601. The next prime is 189123637. The reversal of 189123619 is 916321981.

It is a balanced prime because it is at equal distance from previous prime (189123601) and next prime (189123637).

It is a cyclic number.

It is not a de Polignac number, because 189123619 - 2²¹ = 187026467 is a prime.

It is a super-2 number, since 2×189123619² = 71535486527314322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (189123679) 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, 94561809 + 94561810.

It is an arithmetic number, because the mean of its divisors is an integer number (94561810).

Almost surely, 2^189123619 is an apocalyptic number.

189123619 is a deficient number, since it is larger than the sum of its proper divisors (1).

189123619 is an equidigital number, since it uses as much as digits as its factorization.

189123619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 40.

The square root of 189123619 is about 13752.2223295001. Note that the first 3 decimals coincide. The cubic root of 189123619 is about 574.0044464199.

The spelling of 189123619 in words is "one hundred eighty-nine million, one hundred twenty-three thousand, six hundred nineteen".