999802399 has 2 divisors, whose sum is σ = 999802400. Its totient is φ = 999802398.

The previous prime is 999802393. The next prime is 999802403. The reversal of 999802399 is 993208999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999802399 - 2²⁵ = 966247967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999802393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499901199 + 499901200.

It is an arithmetic number, because the mean of its divisors is an integer number (499901200).

Almost surely, 2^999802399 is an apocalyptic number.

999802399 is a deficient number, since it is larger than the sum of its proper divisors (1).

999802399 is an equidigital number, since it uses as much as digits as its factorization.

999802399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2834352, while the sum is 58.

The square root of 999802399 is about 31619.6521011854. The cubic root of 999802399 is about 999.9341286611.

The spelling of 999802399 in words is "nine hundred ninety-nine million, eight hundred two thousand, three hundred ninety-nine".