865961053 has 4 divisors (see below), whose sum is σ = 867334048. Its totient is φ = 864588060.

The previous prime is 865961051. The next prime is 865961059. The reversal of 865961053 is 350169568.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 865961053 - 2¹ = 865961051 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865961051) 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, 685551 + ... + 686812.

It is an arithmetic number, because the mean of its divisors is an integer number (216833512).

Almost surely, 2^865961053 is an apocalyptic number.

It is an amenable number.

865961053 is a deficient number, since it is larger than the sum of its proper divisors (1372995).

865961053 is a wasteful number, since it uses less digits than its factorization.

865961053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1372994.

The product of its (nonzero) digits is 194400, while the sum is 43.

The square root of 865961053 is about 29427.2161952163. The cubic root of 865961053 is about 953.1606833445.

The spelling of 865961053 in words is "eight hundred sixty-five million, nine hundred sixty-one thousand, fifty-three".