2865793721 has 12 divisors (see below), whose sum is σ = 3418402752. Its totient is φ = 2349037944.

The previous prime is 2865793673. The next prime is 2865793727. The reversal of 2865793721 is 1273975682.

It is not a de Polignac number, because 2865793721 - 2¹⁴ = 2865777337 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2865793721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2865793727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 677150 + ... + 681368.

It is an arithmetic number, because the mean of its divisors is an integer number (284866896).

Almost surely, 2^2865793721 is an apocalyptic number.

It is an amenable number.

2865793721 is a deficient number, since it is larger than the sum of its proper divisors (552609031).

2865793721 is an frugal number, since it uses more digits than its factorization.

2865793721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8468 (or 4249 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 50.

The square root of 2865793721 is about 53533.1086431565. The cubic root of 2865793721 is about 1420.4141027606.

The spelling of 2865793721 in words is "two billion, eight hundred sixty-five million, seven hundred ninety-three thousand, seven hundred twenty-one".