85299909787 has 2 divisors, whose sum is σ = 85299909788. Its totient is φ = 85299909786.

The previous prime is 85299909769. The next prime is 85299909809. The reversal of 85299909787 is 78790999258.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85299909787 - 2¹⁹ = 85299385499 is a prime.

It is not a weakly prime, because it can be changed into another prime (85299909757) 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, 42649954893 + 42649954894.

It is an arithmetic number, because the mean of its divisors is an integer number (42649954894).

Almost surely, 2^85299909787 is an apocalyptic number.

85299909787 is a deficient number, since it is larger than the sum of its proper divisors (1).

85299909787 is an equidigital number, since it uses as much as digits as its factorization.

85299909787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 205752960, while the sum is 73.

The spelling of 85299909787 in words is "eighty-five billion, two hundred ninety-nine million, nine hundred nine thousand, seven hundred eighty-seven".