123131444 has 6 divisors (see below), whose sum is σ = 215480034. Its totient is φ = 61565720.

The previous prime is 123131429. The next prime is 123131483. The reversal of 123131444 is 444131321.

It can be written as a sum of positive squares in only one way, i.e., 74995600 + 48135844 = 8660^2 + 6938^2 .

It is a super-2 number, since 2×123131444² = 30322705003050272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15391427 + ... + 15391434.

It is an arithmetic number, because the mean of its divisors is an integer number (35913339).

Almost surely, 2^123131444 is an apocalyptic number.

It is an amenable number.

123131444 is a deficient number, since it is larger than the sum of its proper divisors (92348590).

123131444 is a wasteful number, since it uses less digits than its factorization.

123131444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30782865 (or 30782863 counting only the distinct ones).

The product of its digits is 1152, while the sum is 23.

The square root of 123131444 is about 11096.4608772347. The cubic root of 123131444 is about 497.4960736372.

Adding to 123131444 its reverse (444131321), we get a palindrome (567262765).

The spelling of 123131444 in words is "one hundred twenty-three million, one hundred thirty-one thousand, four hundred forty-four".