85440799 has 2 divisors, whose sum is σ = 85440800. Its totient is φ = 85440798.

The previous prime is 85440787. The next prime is 85440821. The reversal of 85440799 is 99704458.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85440799 - 2⁵ = 85440767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85440749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42720399 + 42720400.

It is an arithmetic number, because the mean of its divisors is an integer number (42720400).

Almost surely, 2^85440799 is an apocalyptic number.

85440799 is a deficient number, since it is larger than the sum of its proper divisors (1).

85440799 is an equidigital number, since it uses as much as digits as its factorization.

85440799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 85440799 is about 9243.4192266715. The cubic root of 85440799 is about 440.4417034766.

The spelling of 85440799 in words is "eighty-five million, four hundred forty thousand, seven hundred ninety-nine".