123051729019 has 4 divisors (see below), whose sum is σ = 123062423040. Its totient is φ = 123041035000.

The previous prime is 123051728959. The next prime is 123051729041. The reversal of 123051729019 is 910927150321.

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

It is a cyclic number.

It is not a de Polignac number, because 123051729019 - 2²¹ = 123049631867 is a prime.

It is a super-2 number, since 2×123051729019² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123051726019) 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, 5329732 + ... + 5352769.

It is an arithmetic number, because the mean of its divisors is an integer number (30765605760).

Almost surely, 2^123051729019 is an apocalyptic number.

123051729019 is a deficient number, since it is larger than the sum of its proper divisors (10694021).

123051729019 is a wasteful number, since it uses less digits than its factorization.

123051729019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10694020.

The product of its (nonzero) digits is 34020, while the sum is 40.

The spelling of 123051729019 in words is "one hundred twenty-three billion, fifty-one million, seven hundred twenty-nine thousand, nineteen".