9902723 has 2 divisors, whose sum is σ = 9902724. Its totient is φ = 9902722.

The previous prime is 9902707. The next prime is 9902749. The reversal of 9902723 is 3272099.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9902723 - 2⁴ = 9902707 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9902723.

It is not a weakly prime, because it can be changed into another prime (9902023) 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 as a sum of consecutive naturals, namely, 4951361 + 4951362.

It is an arithmetic number, because the mean of its divisors is an integer number (4951362).

Almost surely, 2^9902723 is an apocalyptic number.

9902723 is a deficient number, since it is larger than the sum of its proper divisors (1).

9902723 is an equidigital number, since it uses as much as digits as its factorization.

9902723 is an odious number, because the sum of its binary digits is odd.

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

The square root of 9902723 is about 3146.8592278651. The cubic root of 9902723 is about 214.7426016462.

The spelling of 9902723 in words is "nine million, nine hundred two thousand, seven hundred twenty-three".