123799619 has 2 divisors, whose sum is σ = 123799620. Its totient is φ = 123799618.

The previous prime is 123799609. The next prime is 123799651. The reversal of 123799619 is 916997321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123799619 - 2⁴ = 123799603 is a prime.

It is a super-2 number, since 2×123799619² = 30652691329090322, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (123799609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61899809 + 61899810.

It is an arithmetic number, because the mean of its divisors is an integer number (61899810).

Almost surely, 2^123799619 is an apocalyptic number.

123799619 is a deficient number, since it is larger than the sum of its proper divisors (1).

123799619 is an equidigital number, since it uses as much as digits as its factorization.

123799619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 183708, while the sum is 47.

The square root of 123799619 is about 11126.5277153297. The cubic root of 123799619 is about 498.3943412394.

The spelling of 123799619 in words is "one hundred twenty-three million, seven hundred ninety-nine thousand, six hundred nineteen".