985365709 has 4 divisors (see below), whose sum is σ = 985431004. Its totient is φ = 985300416.

The previous prime is 985365677. The next prime is 985365727. The reversal of 985365709 is 907563589.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 800324100 + 185041609 = 28290^2 + 13603^2 .

It is a cyclic number.

It is not a de Polignac number, because 985365709 - 2⁵ = 985365677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (985365779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2869 + ... + 44485.

It is an arithmetic number, because the mean of its divisors is an integer number (246357751).

Almost surely, 2^985365709 is an apocalyptic number.

It is an amenable number.

985365709 is a deficient number, since it is larger than the sum of its proper divisors (65295).

985365709 is a wasteful number, since it uses less digits than its factorization.

985365709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65294.

The product of its (nonzero) digits is 2041200, while the sum is 52.

The square root of 985365709 is about 31390.5353410865. The cubic root of 985365709 is about 995.0979117977.

The spelling of 985365709 in words is "nine hundred eighty-five million, three hundred sixty-five thousand, seven hundred nine".