123783389 has 8 divisors (see below), whose sum is σ = 127987800. Its totient is φ = 119624256.

The previous prime is 123783377. The next prime is 123783391. The reversal of 123783389 is 983387321.

It can be written as a sum of positive squares in 4 ways, for example, as 3771364 + 120012025 = 1942^2 + 10955^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-123783389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123780389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5714 + ... + 16739.

It is an arithmetic number, because the mean of its divisors is an integer number (15998475).

Almost surely, 2^123783389 is an apocalyptic number.

It is an amenable number.

123783389 is a deficient number, since it is larger than the sum of its proper divisors (4204411).

123783389 is a wasteful number, since it uses less digits than its factorization.

123783389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22639.

The product of its digits is 217728, while the sum is 44.

The square root of 123783389 is about 11125.7983533767. The cubic root of 123783389 is about 498.3725606293.

The spelling of 123783389 in words is "one hundred twenty-three million, seven hundred eighty-three thousand, three hundred eighty-nine".