189123455 has 8 divisors (see below), whose sum is σ = 227026800. Its totient is φ = 151246336.

The previous prime is 189123443. The next prime is 189123499. The reversal of 189123455 is 554321981.

It is a happy number.

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 189123455 - 2⁴ = 189123439 is a prime.

It is a super-2 number, since 2×189123455² = 71535362462274050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17036 + ... + 25854.

It is an arithmetic number, because the mean of its divisors is an integer number (28378350).

Almost surely, 2^189123455 is an apocalyptic number.

189123455 is a deficient number, since it is larger than the sum of its proper divisors (37903345).

189123455 is an equidigital number, since it uses as much as digits as its factorization.

189123455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13113.

The product of its digits is 43200, while the sum is 38.

The square root of 189123455 is about 13752.2163668261. The cubic root of 189123455 is about 574.0042805024.

The spelling of 189123455 in words is "one hundred eighty-nine million, one hundred twenty-three thousand, four hundred fifty-five".