123031616 has 28 divisors (see below), whose sum is σ = 244620288. Its totient is φ = 61395072.

The previous prime is 123031613. The next prime is 123031619. The reversal of 123031616 is 616130321.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (123031613) and next prime (123031619).

It is a junction number, because it is equal to n+sod(n) for n = 123031591 and 123031600.

It is not an unprimeable number, because it can be changed into a prime (123031613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37265 + ... + 40431.

Almost surely, 2^123031616 is an apocalyptic number.

123031616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

123031616 is a deficient number, since it is larger than the sum of its proper divisors (121588672).

123031616 is an equidigital number, since it uses as much as digits as its factorization.

123031616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3786 (or 3776 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 123031616 is about 11091.9617741858. The cubic root of 123031616 is about 497.3615900748.

Adding to 123031616 its reverse (616130321), we get a palindrome (739161937).

The spelling of 123031616 in words is "one hundred twenty-three million, thirty-one thousand, six hundred sixteen".