190123489 has 4 divisors (see below), whose sum is σ = 190846656. Its totient is φ = 189400324.

The previous prime is 190123471. The next prime is 190123499. The reversal of 190123489 is 984321091.

190123489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 984321091 = 13 ⋅75717007.

It is a cyclic number.

It is not a de Polignac number, because 190123489 - 2⁵ = 190123457 is a prime.

It is a super-2 number, since 2×190123489² = 72293882139066242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (190123459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 361189 + ... + 361714.

It is an arithmetic number, because the mean of its divisors is an integer number (47711664).

Almost surely, 2^190123489 is an apocalyptic number.

It is an amenable number.

190123489 is a deficient number, since it is larger than the sum of its proper divisors (723167).

190123489 is an equidigital number, since it uses as much as digits as its factorization.

190123489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723166.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 190123489 is about 13788.5274413187. The cubic root of 190123489 is about 575.0142292635.

The spelling of 190123489 in words is "one hundred ninety million, one hundred twenty-three thousand, four hundred eighty-nine".