936868661 has 4 divisors (see below), whose sum is σ = 937408524. Its totient is φ = 936328800.

The previous prime is 936868631. The next prime is 936868679. The reversal of 936868661 is 166868639.

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 278689636 + 658179025 = 16694^2 + 25655^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-936868661 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 (936868631) 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, 267320 + ... + 270801.

It is an arithmetic number, because the mean of its divisors is an integer number (234352131).

Almost surely, 2^936868661 is an apocalyptic number.

It is an amenable number.

936868661 is a deficient number, since it is larger than the sum of its proper divisors (539863).

936868661 is a wasteful number, since it uses less digits than its factorization.

936868661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539862.

The product of its digits is 2239488, while the sum is 53.

The square root of 936868661 is about 30608.3103257922. The cubic root of 936868661 is about 978.4971624125.

The spelling of 936868661 in words is "nine hundred thirty-six million, eight hundred sixty-eight thousand, six hundred sixty-one".