123455489 has 6 divisors (see below), whose sum is σ = 124750854. Its totient is φ = 122173440.

The previous prime is 123455461. The next prime is 123455531. The reversal of 123455489 is 984554321.

It can be written as a sum of positive squares in 3 ways, for example, as 2455489 + 121000000 = 1567^2 + 11000^2 .

It is a de Polignac number, because none of the positive numbers 2^k-123455489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123455419) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2849 + ... + 15969.

It is an arithmetic number, because the mean of its divisors is an integer number (20791809).

Almost surely, 2^123455489 is an apocalyptic number.

It is an amenable number.

123455489 is a deficient number, since it is larger than the sum of its proper divisors (1295365).

123455489 is an frugal number, since it uses more digits than its factorization.

123455489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13315 (or 13218 counting only the distinct ones).

The product of its digits is 172800, while the sum is 41.

The square root of 123455489 is about 11111.0525604013. The cubic root of 123455489 is about 497.9321114642.

The spelling of 123455489 in words is "one hundred twenty-three million, four hundred fifty-five thousand, four hundred eighty-nine".