123801019 has 4 divisors (see below), whose sum is σ = 129183696. Its totient is φ = 118418344.

The previous prime is 123800969. The next prime is 123801023. The reversal of 123801019 is 910108321.

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 123801019 - 2¹¹ = 123798971 is a prime.

It is a super-2 number, since 2×123801019² = 30653384610876722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123800984 and 123801002.

It is not an unprimeable number, because it can be changed into a prime (123801079) 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, 2691304 + ... + 2691349.

It is an arithmetic number, because the mean of its divisors is an integer number (32295924).

Almost surely, 2^123801019 is an apocalyptic number.

123801019 is a deficient number, since it is larger than the sum of its proper divisors (5382677).

123801019 is an equidigital number, since it uses as much as digits as its factorization.

123801019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5382676.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 123801019 is about 11126.5906278608. The cubic root of 123801019 is about 498.3962199459.

The spelling of 123801019 in words is "one hundred twenty-three million, eight hundred one thousand, nineteen".