123345901479 has 4 divisors (see below), whose sum is σ = 164461201976. Its totient is φ = 82230600984.

The previous prime is 123345901453. The next prime is 123345901487. The reversal of 123345901479 is 974109543321.

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

It is not a de Polignac number, because 123345901479 - 2⁹ = 123345900967 is a prime.

It is a super-2 number, since 2×123345901479² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123345901409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20557650244 + ... + 20557650249.

It is an arithmetic number, because the mean of its divisors is an integer number (41115300494).

Almost surely, 2^123345901479 is an apocalyptic number.

123345901479 is a deficient number, since it is larger than the sum of its proper divisors (41115300497).

123345901479 is an equidigital number, since it uses as much as digits as its factorization.

123345901479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41115300496.

The product of its (nonzero) digits is 816480, while the sum is 48.

The spelling of 123345901479 in words is "one hundred twenty-three billion, three hundred forty-five million, nine hundred one thousand, four hundred seventy-nine".