123680554 has 4 divisors (see below), whose sum is σ = 185520834. Its totient is φ = 61840276.

The previous prime is 123680549. The next prime is 123680561. The reversal of 123680554 is 455086321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 455086321 = 17747 ⋅25643.

It can be written as a sum of positive squares in only one way, i.e., 118265625 + 5414929 = 10875^2 + 2327^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30920137 + ... + 30920140.

Almost surely, 2^123680554 is an apocalyptic number.

123680554 is a deficient number, since it is larger than the sum of its proper divisors (61840280).

123680554 is an equidigital number, since it uses as much as digits as its factorization.

123680554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61840279.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 123680554 is about 11121.1759270322. The cubic root of 123680554 is about 498.2345121089.

The spelling of 123680554 in words is "one hundred twenty-three million, six hundred eighty thousand, five hundred fifty-four".