861317073 has 6 divisors (see below), whose sum is σ = 1244124674. Its totient is φ = 574211376.

The previous prime is 861317059. The next prime is 861317111. The reversal of 861317073 is 370713168.

It can be written as a sum of positive squares in only one way, i.e., 853633089 + 7683984 = 29217^2 + 2772^2 .

It is not a de Polignac number, because 861317073 - 2⁴ = 861317057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (861317773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 47850940 + ... + 47850957.

Almost surely, 2^861317073 is an apocalyptic number.

It is an amenable number.

861317073 is a deficient number, since it is larger than the sum of its proper divisors (382807601).

861317073 is a wasteful number, since it uses less digits than its factorization.

861317073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95701903 (or 95701900 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 861317073 is about 29348.2039143795. The cubic root of 861317073 is about 951.4537568650.

The spelling of 861317073 in words is "eight hundred sixty-one million, three hundred seventeen thousand, seventy-three".