816499 has 2 divisors, whose sum is σ = 816500. Its totient is φ = 816498.

The previous prime is 816469. The next prime is 816521. The reversal of 816499 is 994618.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 816499 - 2¹³ = 808307 is a prime.

It is not a weakly prime, because it can be changed into another prime (816469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408249 + 408250.

It is an arithmetic number, because the mean of its divisors is an integer number (408250).

2⁸¹⁶⁴⁹⁹ is an apocalyptic number.

816499 is a deficient number, since it is larger than the sum of its proper divisors (1).

816499 is an equidigital number, since it uses as much as digits as its factorization.

816499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 37.

The square root of 816499 is about 903.6033421806. The cubic root of 816499 is about 93.4656188232.

The spelling of 816499 in words is "eight hundred sixteen thousand, four hundred ninety-nine".