985728787 has 2 divisors, whose sum is σ = 985728788. Its totient is φ = 985728786.

The previous prime is 985728767. The next prime is 985728811. The reversal of 985728787 is 787827589.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-985728787 is a prime.

It is a super-2 number, since 2×985728787² = 1943322483040982738, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (985728767) 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, 492864393 + 492864394.

It is an arithmetic number, because the mean of its divisors is an integer number (492864394).

Almost surely, 2^985728787 is an apocalyptic number.

985728787 is a deficient number, since it is larger than the sum of its proper divisors (1).

985728787 is an equidigital number, since it uses as much as digits as its factorization.

985728787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15805440, while the sum is 61.

The square root of 985728787 is about 31396.3180484591. The cubic root of 985728787 is about 995.2201181317.

The spelling of 985728787 in words is "nine hundred eighty-five million, seven hundred twenty-eight thousand, seven hundred eighty-seven".