800961605 has 8 divisors (see below), whose sum is σ = 962021112. Its totient is φ = 640191168.

The previous prime is 800961571. The next prime is 800961611. The reversal of 800961605 is 506169008.

It can be written as a sum of positive squares in 4 ways, for example, as 103103716 + 697857889 = 10154^2 + 26417^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 800961605 - 2¹⁶ = 800896069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66122 + ... + 77291.

It is an arithmetic number, because the mean of its divisors is an integer number (120252639).

Almost surely, 2^800961605 is an apocalyptic number.

It is an amenable number.

800961605 is a deficient number, since it is larger than the sum of its proper divisors (161059507).

800961605 is a wasteful number, since it uses less digits than its factorization.

800961605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144535.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 800961605 is about 28301.2650777311. The cubic root of 800961605 is about 928.6895657133.

The spelling of 800961605 in words is "eight hundred million, nine hundred sixty-one thousand, six hundred five".