908959661 has 4 divisors (see below), whose sum is σ = 909672732. Its totient is φ = 908246592.

The previous prime is 908959637. The next prime is 908959691. The reversal of 908959661 is 166959809.

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 566154436 + 342805225 = 23794^2 + 18515^2 .

It is a cyclic number.

It is not a de Polignac number, because 908959661 - 2¹⁰ = 908958637 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 (908959691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 354620 + ... + 357173.

It is an arithmetic number, because the mean of its divisors is an integer number (227418183).

Almost surely, 2^908959661 is an apocalyptic number.

It is an amenable number.

908959661 is a deficient number, since it is larger than the sum of its proper divisors (713071).

908959661 is a wasteful number, since it uses less digits than its factorization.

908959661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713070.

The product of its (nonzero) digits is 1049760, while the sum is 53.

The square root of 908959661 is about 30148.9578758537. The cubic root of 908959661 is about 968.6826844880.

The spelling of 908959661 in words is "nine hundred eight million, nine hundred fifty-nine thousand, six hundred sixty-one".