123030661 has 24 divisors (see below), whose sum is σ = 141195264. Its totient is φ = 106453440.

The previous prime is 123030653. The next prime is 123030689. The reversal of 123030661 is 166030321.

It is not a de Polignac number, because 123030661 - 2³ = 123030653 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 (123031661) 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 in 23 ways as a sum of consecutive naturals, for example, 551596 + ... + 551818.

It is an arithmetic number, because the mean of its divisors is an integer number (5883136).

Almost surely, 2^123030661 is an apocalyptic number.

It is an amenable number.

123030661 is a deficient number, since it is larger than the sum of its proper divisors (18164603).

123030661 is a wasteful number, since it uses less digits than its factorization.

123030661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341 (or 304 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 123030661 is about 11091.9187249096. The cubic root of 123030661 is about 497.3603031927.

Adding to 123030661 its reverse (166030321), we get a palindrome (289060982).

The spelling of 123030661 in words is "one hundred twenty-three million, thirty thousand, six hundred sixty-one".