78828499 has 2 divisors, whose sum is σ = 78828500. Its totient is φ = 78828498.

The previous prime is 78828487. The next prime is 78828517. The reversal of 78828499 is 99482887.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78828499 - 2¹⁹ = 78304211 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78828469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39414249 + 39414250.

It is an arithmetic number, because the mean of its divisors is an integer number (39414250).

Almost surely, 2^78828499 is an apocalyptic number.

78828499 is a deficient number, since it is larger than the sum of its proper divisors (1).

78828499 is an equidigital number, since it uses as much as digits as its factorization.

78828499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2322432, while the sum is 55.

The square root of 78828499 is about 8878.5414905828. The cubic root of 78828499 is about 428.7733184087.

The spelling of 78828499 in words is "seventy-eight million, eight hundred twenty-eight thousand, four hundred ninety-nine".