123439101 has 4 divisors (see below), whose sum is σ = 164585472. Its totient is φ = 82292732.

The previous prime is 123439097. The next prime is 123439153. The reversal of 123439101 is 101934321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 123439101 - 2² = 123439097 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123439171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20573181 + ... + 20573186.

It is an arithmetic number, because the mean of its divisors is an integer number (41146368).

Almost surely, 2^123439101 is an apocalyptic number.

It is an amenable number.

123439101 is a deficient number, since it is larger than the sum of its proper divisors (41146371).

123439101 is an equidigital number, since it uses as much as digits as its factorization.

123439101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41146370.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 123439101 is about 11110.3150720400. The cubic root of 123439101 is about 497.9100779561.

The spelling of 123439101 in words is "one hundred twenty-three million, four hundred thirty-nine thousand, one hundred one".