123619 has 2 divisors, whose sum is σ = 123620. Its totient is φ = 123618.

The previous prime is 123601. The next prime is 123631. The reversal of 123619 is 916321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 123619 - 2⁷ = 123491 is a prime.

It is a super-2 number, since 2×123619² = 30563314322, which contains 22 as substring.

123619 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 123619.

It is not a weakly prime, because it can be changed into another prime (123419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61809 + 61810.

It is an arithmetic number, because the mean of its divisors is an integer number (61810).

2¹²³⁶¹⁹ is an apocalyptic number.

123619 is a deficient number, since it is larger than the sum of its proper divisors (1).

123619 is an equidigital number, since it uses as much as digits as its factorization.

123619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324, while the sum is 22.

The square root of 123619 is about 351.5949373924. The cubic root of 123619 is about 49.8151843720.

The spelling of 123619 in words is "one hundred twenty-three thousand, six hundred nineteen".