123530649 has 16 divisors (see below), whose sum is σ = 180111360. Its totient is φ = 74687760.

The previous prime is 123530621. The next prime is 123530669. The reversal of 123530649 is 946035321.

It is not a de Polignac number, because 123530649 - 2⁷ = 123530521 is a prime.

It is a super-2 number, since 2×123530649² = 30519642484722402, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (123530669) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 10224 + ... + 18750.

It is an arithmetic number, because the mean of its divisors is an integer number (11256960).

Almost surely, 2^123530649 is an apocalyptic number.

It is an amenable number.

123530649 is a deficient number, since it is larger than the sum of its proper divisors (56580711).

123530649 is a wasteful number, since it uses less digits than its factorization.

123530649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8980.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 123530649 is about 11114.4342636051. The cubic root of 123530649 is about 498.0331383893.

The spelling of 123530649 in words is "one hundred twenty-three million, five hundred thirty thousand, six hundred forty-nine".