99728723 has 2 divisors, whose sum is σ = 99728724. Its totient is φ = 99728722.

The previous prime is 99728711. The next prime is 99728729. The reversal of 99728723 is 32782799.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 99728723 - 2¹⁰ = 99727699 is a prime.

It is not a weakly prime, because it can be changed into another prime (99728729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49864361 + 49864362.

It is an arithmetic number, because the mean of its divisors is an integer number (49864362).

Almost surely, 2^99728723 is an apocalyptic number.

99728723 is a deficient number, since it is larger than the sum of its proper divisors (1).

99728723 is an equidigital number, since it uses as much as digits as its factorization.

99728723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 381024, while the sum is 47.

The square root of 99728723 is about 9986.4269386002. The cubic root of 99728723 is about 463.7387844901.

The spelling of 99728723 in words is "ninety-nine million, seven hundred twenty-eight thousand, seven hundred twenty-three".