85800749 has 2 divisors, whose sum is σ = 85800750. Its totient is φ = 85800748.

The previous prime is 85800739. The next prime is 85800791. The reversal of 85800749 is 94700858.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85285225 + 515524 = 9235^2 + 718^2 .

It is a cyclic number.

It is not a de Polignac number, because 85800749 - 2²⁴ = 69023533 is a prime.

It is a super-2 number, since 2×85800749² = 14723537057922002, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85800739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42900374 + 42900375.

It is an arithmetic number, because the mean of its divisors is an integer number (42900375).

Almost surely, 2^85800749 is an apocalyptic number.

It is an amenable number.

85800749 is a deficient number, since it is larger than the sum of its proper divisors (1).

85800749 is an equidigital number, since it uses as much as digits as its factorization.

85800749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 85800749 is about 9262.8693718523. The cubic root of 85800749 is about 441.0593431418.

The spelling of 85800749 in words is "eighty-five million, eight hundred thousand, seven hundred forty-nine".