861330049 has 4 divisors (see below), whose sum is σ = 864270036. Its totient is φ = 858390064.

The previous prime is 861330047. The next prime is 861330053. The reversal of 861330049 is 940033168.

861330049 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 632019600 + 229310449 = 25140^2 + 15143^2 .

It is a cyclic number.

It is not a de Polignac number, because 861330049 - 2¹ = 861330047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 861329996 and 861330023.

It is not an unprimeable number, because it can be changed into a prime (861330047) 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, 1469554 + ... + 1470139.

It is an arithmetic number, because the mean of its divisors is an integer number (216067509).

Almost surely, 2^861330049 is an apocalyptic number.

It is an amenable number.

861330049 is a deficient number, since it is larger than the sum of its proper divisors (2939987).

861330049 is a wasteful number, since it uses less digits than its factorization.

861330049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2939986.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 861330049 is about 29348.4249832934. The cubic root of 861330049 is about 951.4585348197.

The spelling of 861330049 in words is "eight hundred sixty-one million, three hundred thirty thousand, forty-nine".