927648661 has 4 divisors (see below), whose sum is σ = 929852524. Its totient is φ = 925444800.

The previous prime is 927648653. The next prime is 927648671. The reversal of 927648661 is 166846729.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 166846729 = 7 ⋅23835247.

It can be written as a sum of positive squares in 2 ways, for example, as 105966436 + 821682225 = 10294^2 + 28665^2 .

It is a cyclic number.

It is not a de Polignac number, because 927648661 - 2³ = 927648653 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 (927648641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1101300 + ... + 1102141.

It is an arithmetic number, because the mean of its divisors is an integer number (232463131).

Almost surely, 2^927648661 is an apocalyptic number.

It is an amenable number.

927648661 is a deficient number, since it is larger than the sum of its proper divisors (2203863).

927648661 is a wasteful number, since it uses less digits than its factorization.

927648661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2203862.

The product of its digits is 870912, while the sum is 49.

The square root of 927648661 is about 30457.3252436914. The cubic root of 927648661 is about 975.2766818538.

The spelling of 927648661 in words is "nine hundred twenty-seven million, six hundred forty-eight thousand, six hundred sixty-one".