9900743 has 4 divisors (see below), whose sum is σ = 9918480. Its totient is φ = 9883008.

The previous prime is 9900733. The next prime is 9900757. The reversal of 9900743 is 3470099.

It is a happy number.

9900743 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 9900743 - 2⁸ = 9900487 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 (9900733) 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, 8003 + ... + 9156.

It is an arithmetic number, because the mean of its divisors is an integer number (2479620).

Almost surely, 2^9900743 is an apocalyptic number.

9900743 is a deficient number, since it is larger than the sum of its proper divisors (17737).

9900743 is a wasteful number, since it uses less digits than its factorization.

9900743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17736.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 9900743 is about 3146.5446127459. The cubic root of 9900743 is about 214.7282884553.

The spelling of 9900743 in words is "nine million, nine hundred thousand, seven hundred forty-three".