123489081 has 12 divisors (see below), whose sum is σ = 178950720. Its totient is φ = 82059480.

The previous prime is 123489059. The next prime is 123489083. The reversal of 123489081 is 180984321.

It is not a de Polignac number, because 123489081 - 2¹⁵ = 123456313 is a prime.

It is a super-2 number, since 2×123489081² = 30499106252449122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123489083) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19261 + ... + 24858.

It is an arithmetic number, because the mean of its divisors is an integer number (14912560).

Almost surely, 2^123489081 is an apocalyptic number.

It is an amenable number.

123489081 is a deficient number, since it is larger than the sum of its proper divisors (55461639).

123489081 is a wasteful number, since it uses less digits than its factorization.

123489081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44436 (or 44433 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 123489081 is about 11112.5641055519. The cubic root of 123489081 is about 497.9772694904.

The spelling of 123489081 in words is "one hundred twenty-three million, four hundred eighty-nine thousand, eighty-one".