123683447938 has 4 divisors (see below), whose sum is σ = 185525171910. Its totient is φ = 61841723968.

The previous prime is 123683447863. The next prime is 123683447947. The reversal of 123683447938 is 839744386321.

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

It can be written as a sum of positive squares in only one way, i.e., 123547329049 + 136118889 = 351493^2 + 11667^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30920861983 + ... + 30920861986.

Almost surely, 2^123683447938 is an apocalyptic number.

123683447938 is a deficient number, since it is larger than the sum of its proper divisors (61841723972).

123683447938 is an equidigital number, since it uses as much as digits as its factorization.

123683447938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61841723971.

The product of its digits is 20901888, while the sum is 58.

The spelling of 123683447938 in words is "one hundred twenty-three billion, six hundred eighty-three million, four hundred forty-seven thousand, nine hundred thirty-eight".