123117958 has 4 divisors (see below), whose sum is σ = 184676940. Its totient is φ = 61558978.

The previous prime is 123117923. The next prime is 123117959. The reversal of 123117958 is 859711321.

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 (123117959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30779488 + ... + 30779491.

It is an arithmetic number, because the mean of its divisors is an integer number (46169235).

Almost surely, 2^123117958 is an apocalyptic number.

123117958 is a deficient number, since it is larger than the sum of its proper divisors (61558982).

123117958 is an equidigital number, since it uses as much as digits as its factorization.

123117958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61558981.

The product of its digits is 15120, while the sum is 37.

The square root of 123117958 is about 11095.8531893676. The cubic root of 123117958 is about 497.4779101830.

The spelling of 123117958 in words is "one hundred twenty-three million, one hundred seventeen thousand, nine hundred fifty-eight".