123628949 has 8 divisors (see below), whose sum is σ = 125500800. Its totient is φ = 121770000.

The previous prime is 123628919. The next prime is 123628993. The reversal of 123628949 is 949826321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123628949 - 2²⁴ = 106851733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123628919) 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 7 ways as a sum of consecutive naturals, for example, 17024 + ... + 23174.

It is an arithmetic number, because the mean of its divisors is an integer number (15687600).

Almost surely, 2^123628949 is an apocalyptic number.

It is an amenable number.

123628949 is a deficient number, since it is larger than the sum of its proper divisors (1871851).

123628949 is a wasteful number, since it uses less digits than its factorization.

123628949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6451.

The product of its digits is 186624, while the sum is 44.

The square root of 123628949 is about 11118.8555616124. The cubic root of 123628949 is about 498.1652073072.

The spelling of 123628949 in words is "one hundred twenty-three million, six hundred twenty-eight thousand, nine hundred forty-nine".