9990471 has 8 divisors (see below), whose sum is σ = 13780080. Its totient is φ = 6430592.

The previous prime is 9990467. The next prime is 9990473. The reversal of 9990471 is 1740999.

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

It is a cyclic number.

It is not a de Polignac number, because 9990471 - 2² = 9990467 is a prime.

It is a super-3 number, since 3×9990471³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9990473) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 57330 + ... + 57503.

It is an arithmetic number, because the mean of its divisors is an integer number (1722510).

Almost surely, 2^9990471 is an apocalyptic number.

9990471 is a deficient number, since it is larger than the sum of its proper divisors (3789609).

9990471 is a wasteful number, since it uses less digits than its factorization.

9990471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114865.

The product of its (nonzero) digits is 20412, while the sum is 39.

The square root of 9990471 is about 3160.7706338803. The cubic root of 9990471 is about 215.3750152282.

The spelling of 9990471 in words is "nine million, nine hundred ninety thousand, four hundred seventy-one".