82403999 has 2 divisors, whose sum is σ = 82404000. Its totient is φ = 82403998.

The previous prime is 82403987. The next prime is 82404001. The reversal of 82403999 is 99930428.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82403999 is a prime.

Together with 82404001, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82403929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41201999 + 41202000.

It is an arithmetic number, because the mean of its divisors is an integer number (41202000).

Almost surely, 2^82403999 is an apocalyptic number.

82403999 is a deficient number, since it is larger than the sum of its proper divisors (1).

82403999 is an equidigital number, since it uses as much as digits as its factorization.

82403999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 82403999 is about 9077.6648428988. The cubic root of 82403999 is about 435.1604622267.

The spelling of 82403999 in words is "eighty-two million, four hundred three thousand, nine hundred ninety-nine".