123305678 has 4 divisors (see below), whose sum is σ = 184958520. Its totient is φ = 61652838.

The previous prime is 123305671. The next prime is 123305681. The reversal of 123305678 is 876503321.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123305671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30826418 + ... + 30826421.

It is an arithmetic number, because the mean of its divisors is an integer number (46239630).

Almost surely, 2^123305678 is an apocalyptic number.

123305678 is a deficient number, since it is larger than the sum of its proper divisors (61652842).

123305678 is an equidigital number, since it uses as much as digits as its factorization.

123305678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61652841.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 123305678 is about 11104.3089834532. The cubic root of 123305678 is about 497.7306194068.

Adding to 123305678 its reverse (876503321), we get a palindrome (999808999).

The spelling of 123305678 in words is "one hundred twenty-three million, three hundred five thousand, six hundred seventy-eight".