123649616 has 20 divisors (see below), whose sum is σ = 240470100. Its totient is φ = 61592832.

The previous prime is 123649601. The next prime is 123649627. The reversal of 123649616 is 616946321.

It can be written as a sum of positive squares in 2 ways, for example, as 24049216 + 99600400 = 4904^2 + 9980^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 123649616.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10061 + ... + 18668.

It is an arithmetic number, because the mean of its divisors is an integer number (12023505).

Almost surely, 2^123649616 is an apocalyptic number.

123649616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

123649616 is a deficient number, since it is larger than the sum of its proper divisors (116820484).

123649616 is a wasteful number, since it uses less digits than its factorization.

123649616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29006 (or 29000 counting only the distinct ones).

The product of its digits is 46656, while the sum is 38.

The square root of 123649616 is about 11119.7848900057. The cubic root of 123649616 is about 498.1929651174.

The spelling of 123649616 in words is "one hundred twenty-three million, six hundred forty-nine thousand, six hundred sixteen".