123031660 has 24 divisors (see below), whose sum is σ = 265350960. Its totient is φ = 47882304.

The previous prime is 123031633. The next prime is 123031661. The reversal of 123031660 is 66130321.

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 7 ways as a sum of consecutive naturals, for example, 82390 + ... + 83869.

It is an arithmetic number, because the mean of its divisors is an integer number (11056290).

Almost surely, 2^123031660 is an apocalyptic number.

123031660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123031660 is an abundant number, since it is smaller than the sum of its proper divisors (142319300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123031660 is a wasteful number, since it uses less digits than its factorization.

123031660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166305 (or 166303 counting only the distinct ones).

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

The square root of 123031660 is about 11091.9637576040. The cubic root of 123031660 is about 497.3616493656.

Adding to 123031660 its reverse (66130321), we get a palindrome (189161981).

The spelling of 123031660 in words is "one hundred twenty-three million, thirty-one thousand, six hundred sixty".