123680019 has 8 divisors (see below), whose sum is σ = 164958160. Its totient is φ = 82427616.

The previous prime is 123680009. The next prime is 123680021. The reversal of 123680019 is 910086321.

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

It is not a de Polignac number, because 123680019 - 2⁷ = 123679891 is a prime.

It is a super-2 number, since 2×123680019² = 30593494199680722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123680009) 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, 14697 + ... + 21525.

It is an arithmetic number, because the mean of its divisors is an integer number (20619770).

Almost surely, 2^123680019 is an apocalyptic number.

123680019 is a deficient number, since it is larger than the sum of its proper divisors (41278141).

123680019 is an equidigital number, since it uses as much as digits as its factorization.

123680019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12869.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 123680019 is about 11121.1518737944. The cubic root of 123680019 is about 498.2337937102.

The spelling of 123680019 in words is "one hundred twenty-three million, six hundred eighty thousand, nineteen".