123041638 has 4 divisors (see below), whose sum is σ = 184562460. Its totient is φ = 61520818.

The previous prime is 123041617. The next prime is 123041641. The reversal of 123041638 is 836140321.

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

It is a congruent number.

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, 30760408 + ... + 30760411.

It is an arithmetic number, because the mean of its divisors is an integer number (46140615).

Almost surely, 2^123041638 is an apocalyptic number.

123041638 is a deficient number, since it is larger than the sum of its proper divisors (61520822).

123041638 is an equidigital number, since it uses as much as digits as its factorization.

123041638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61520821.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 123041638 is about 11092.4135335823. The cubic root of 123041638 is about 497.3750945237.

Adding to 123041638 its reverse (836140321), we get a palindrome (959181959).

The spelling of 123041638 in words is "one hundred twenty-three million, forty-one thousand, six hundred thirty-eight".