123899444 has 6 divisors (see below), whose sum is σ = 216824034. Its totient is φ = 61949720.

The previous prime is 123899441. The next prime is 123899453. The reversal of 123899444 is 444998321.

It can be written as a sum of positive squares in only one way, i.e., 64609444 + 59290000 = 8038^2 + 7700^2 .

It is a junction number, because it is equal to n+sod(n) for n = 123899395 and 123899404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123899441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15487427 + ... + 15487434.

It is an arithmetic number, because the mean of its divisors is an integer number (36137339).

Almost surely, 2^123899444 is an apocalyptic number.

It is an amenable number.

123899444 is a deficient number, since it is larger than the sum of its proper divisors (92924590).

123899444 is a wasteful number, since it uses less digits than its factorization.

123899444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30974865 (or 30974863 counting only the distinct ones).

The product of its digits is 248832, while the sum is 44.

The square root of 123899444 is about 11131.0127122378. The cubic root of 123899444 is about 498.5282642381.

The spelling of 123899444 in words is "one hundred twenty-three million, eight hundred ninety-nine thousand, four hundred forty-four".