123355489 has 4 divisors (see below), whose sum is σ = 125446320. Its totient is φ = 121264660.

The previous prime is 123355487. The next prime is 123355499. The reversal of 123355489 is 984553321.

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.

It is a cyclic number.

It is not a de Polignac number, because 123355489 - 2¹ = 123355487 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123355483) 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, 1045327 + ... + 1045444.

It is an arithmetic number, because the mean of its divisors is an integer number (31361580).

Almost surely, 2^123355489 is an apocalyptic number.

It is an amenable number.

123355489 is a deficient number, since it is larger than the sum of its proper divisors (2090831).

123355489 is an equidigital number, since it uses as much as digits as its factorization.

123355489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2090830.

The product of its digits is 129600, while the sum is 40.

The square root of 123355489 is about 11106.5516250545. The cubic root of 123355489 is about 497.7976320608.

The spelling of 123355489 in words is "one hundred twenty-three million, three hundred fifty-five thousand, four hundred eighty-nine".