816019 has 2 divisors, whose sum is σ = 816020. Its totient is φ = 816018.

The previous prime is 815989. The next prime is 816037. The reversal of 816019 is 910618.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 816019 - 2⁷ = 815891 is a prime.

It is a super-2 number, since 2×816019² = 1331774016722, which contains 22 as substring.

816019 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 815984 and 816002.

It is not a weakly prime, because it can be changed into another prime (816919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408009 + 408010.

It is an arithmetic number, because the mean of its divisors is an integer number (408010).

2⁸¹⁶⁰¹⁹ is an apocalyptic number.

816019 is a deficient number, since it is larger than the sum of its proper divisors (1).

816019 is an equidigital number, since it uses as much as digits as its factorization.

816019 is an odious number, because the sum of its binary digits is odd.

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

The square root of 816019 is about 903.3376998664. The cubic root of 816019 is about 93.4472998413.

The spelling of 816019 in words is "eight hundred sixteen thousand, nineteen".