865940079 has 32 divisors (see below), whose sum is σ = 1213922304. Its totient is φ = 548599680.

The previous prime is 865940077. The next prime is 865940083. The reversal of 865940079 is 970049568.

It is not a de Polignac number, because 865940079 - 2¹ = 865940077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865940077) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 713277 + ... + 714489.

It is an arithmetic number, because the mean of its divisors is an integer number (37935072).

Almost surely, 2^865940079 is an apocalyptic number.

865940079 is a deficient number, since it is larger than the sum of its proper divisors (347982225).

865940079 is a wasteful number, since it uses less digits than its factorization.

865940079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1407.

The product of its (nonzero) digits is 544320, while the sum is 48.

The square root of 865940079 is about 29426.8598222780. The cubic root of 865940079 is about 953.1529879432.

The spelling of 865940079 in words is "eight hundred sixty-five million, nine hundred forty thousand, seventy-nine".