946989661 has 4 divisors (see below), whose sum is σ = 947164924. Its totient is φ = 946814400.

The previous prime is 946989629. The next prime is 946989689. The reversal of 946989661 is 166989649.

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 380835225 + 566154436 = 19515^2 + 23794^2 .

It is a cyclic number.

It is not a de Polignac number, because 946989661 - 2⁵ = 946989629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 946989596 and 946989605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (946989611) 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, 79260 + ... + 90421.

It is an arithmetic number, because the mean of its divisors is an integer number (236791231).

Almost surely, 2^946989661 is an apocalyptic number.

It is an amenable number.

946989661 is a deficient number, since it is larger than the sum of its proper divisors (175263).

946989661 is a wasteful number, since it uses less digits than its factorization.

946989661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175262.

The product of its digits is 5038848, while the sum is 58.

The square root of 946989661 is about 30773.1971202214. The cubic root of 946989661 is about 982.0081206475.

The spelling of 946989661 in words is "nine hundred forty-six million, nine hundred eighty-nine thousand, six hundred sixty-one".