9900291 has 4 divisors (see below), whose sum is σ = 13200392. Its totient is φ = 6600192.

The previous prime is 9900287. The next prime is 9900301. The reversal of 9900291 is 1920099.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 9900291 - 2² = 9900287 is a prime.

It is a Duffinian number.

9900291 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9900251) 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, 1650046 + ... + 1650051.

It is an arithmetic number, because the mean of its divisors is an integer number (3300098).

Almost surely, 2^9900291 is an apocalyptic number.

9900291 is a deficient number, since it is larger than the sum of its proper divisors (3300101).

9900291 is a wasteful number, since it uses less digits than its factorization.

9900291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3300100.

The product of its (nonzero) digits is 1458, while the sum is 30.

The square root of 9900291 is about 3146.4727871062. The cubic root of 9900291 is about 214.7250207321.

The spelling of 9900291 in words is "nine million, nine hundred thousand, two hundred ninety-one".