123649419979 has 8 divisors (see below), whose sum is σ = 126101412720. Its totient is φ = 121209302016.

The previous prime is 123649419973. The next prime is 123649419991. The reversal of 123649419979 is 979914946321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123649419979 - 2¹⁹ = 123648895691 is a prime.

It is a super-2 number, since 2×123649419979² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123649419979.

It is not an unprimeable number, because it can be changed into a prime (123649419973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2947662 + ... + 2989315.

It is an arithmetic number, because the mean of its divisors is an integer number (15762676590).

Almost surely, 2^123649419979 is an apocalyptic number.

123649419979 is a deficient number, since it is larger than the sum of its proper divisors (2451992741).

123649419979 is an equidigital number, since it uses as much as digits as its factorization.

123649419979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5937389.

The product of its digits is 26453952, while the sum is 64.

The spelling of 123649419979 in words is "one hundred twenty-three billion, six hundred forty-nine million, four hundred nineteen thousand, nine hundred seventy-nine".