9809090 has 8 divisors (see below), whose sum is σ = 17656380. Its totient is φ = 3923632.

The previous prime is 9809089. The next prime is 9809123. The reversal of 9809090 is 909089.

It can be written as a sum of positive squares in 2 ways, for example, as 9803161 + 5929 = 3131^2 + 77^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

9809090 is a modest number, since divided by 9090 gives 980 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 9809090.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 490445 + ... + 490464.

Almost surely, 2^9809090 is an apocalyptic number.

9809090 is a deficient number, since it is larger than the sum of its proper divisors (7847290).

9809090 is a wasteful number, since it uses less digits than its factorization.

9809090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980916.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 9809090 is about 3131.9466789842. The cubic root of 9809090 is about 214.0636401985.

The spelling of 9809090 in words is "nine million, eight hundred nine thousand, ninety".