969261661 has 4 divisors (see below), whose sum is σ = 982539292. Its totient is φ = 955984032.

The previous prime is 969261641. The next prime is 969261679. The reversal of 969261661 is 166162969.

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 560979225 + 408282436 = 23685^2 + 20206^2 .

It is a cyclic number.

It is not a de Polignac number, because 969261661 - 2⁹ = 969261149 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 (969261641) 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, 6638706 + ... + 6638851.

It is an arithmetic number, because the mean of its divisors is an integer number (245634823).

Almost surely, 2^969261661 is an apocalyptic number.

It is an amenable number.

969261661 is a deficient number, since it is larger than the sum of its proper divisors (13277631).

969261661 is a wasteful number, since it uses less digits than its factorization.

969261661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13277630.

The product of its digits is 209952, while the sum is 46.

The square root of 969261661 is about 31132.9674300411. The cubic root of 969261661 is about 989.6470738054.

The spelling of 969261661 in words is "nine hundred sixty-nine million, two hundred sixty-one thousand, six hundred sixty-one".