123375638 has 4 divisors (see below), whose sum is σ = 185063460. Its totient is φ = 61687818.

The previous prime is 123375631. The next prime is 123375653. The reversal of 123375638 is 836573321.

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 (123375631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30843908 + ... + 30843911.

It is an arithmetic number, because the mean of its divisors is an integer number (46265865).

Almost surely, 2^123375638 is an apocalyptic number.

123375638 is a deficient number, since it is larger than the sum of its proper divisors (61687822).

123375638 is an equidigital number, since it uses as much as digits as its factorization.

123375638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61687821.

The product of its digits is 90720, while the sum is 38.

The square root of 123375638 is about 11107.4586652393. The cubic root of 123375638 is about 497.8247341609.

The spelling of 123375638 in words is "one hundred twenty-three million, three hundred seventy-five thousand, six hundred thirty-eight".