861119973 has 18 divisors (see below), whose sum is σ = 1446916614. Its totient is φ = 492068304.

The previous prime is 861119933. The next prime is 861119983. The reversal of 861119973 is 379911168.

It can be written as a sum of positive squares in only one way, i.e., 789497604 + 71622369 = 28098^2 + 8463^2 .

It is not a de Polignac number, because 861119973 - 2¹² = 861115877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861119933) 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 17 ways as a sum of consecutive naturals, for example, 975886 + ... + 976767.

Almost surely, 2^861119973 is an apocalyptic number.

It is an amenable number.

861119973 is a deficient number, since it is larger than the sum of its proper divisors (585796641).

861119973 is a wasteful number, since it uses less digits than its factorization.

861119973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1952673 (or 1952663 counting only the distinct ones).

The product of its digits is 81648, while the sum is 45.

The square root of 861119973 is about 29344.8457654832. The cubic root of 861119973 is about 951.3811758346.

The spelling of 861119973 in words is "eight hundred sixty-one million, one hundred nineteen thousand, nine hundred seventy-three".