85280399 has 2 divisors, whose sum is σ = 85280400. Its totient is φ = 85280398.

The previous prime is 85280353. The next prime is 85280413. The reversal of 85280399 is 99308258.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85280399 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85280099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42640199 + 42640200.

It is an arithmetic number, because the mean of its divisors is an integer number (42640200).

Almost surely, 2^85280399 is an apocalyptic number.

85280399 is a deficient number, since it is larger than the sum of its proper divisors (1).

85280399 is an equidigital number, since it uses as much as digits as its factorization.

85280399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 85280399 is about 9234.7387077275. The cubic root of 85280399 is about 440.1659136697.

The spelling of 85280399 in words is "eighty-five million, two hundred eighty thousand, three hundred ninety-nine".