998969723 has 2 divisors, whose sum is σ = 998969724. Its totient is φ = 998969722.

The previous prime is 998969701. The next prime is 998969743. The reversal of 998969723 is 327969899.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 998969723 - 2⁶ = 998969659 is a prime.

It is not a weakly prime, because it can be changed into another prime (998969743) 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, 499484861 + 499484862.

It is an arithmetic number, because the mean of its divisors is an integer number (499484862).

Almost surely, 2^998969723 is an apocalyptic number.

998969723 is a deficient number, since it is larger than the sum of its proper divisors (1).

998969723 is an equidigital number, since it uses as much as digits as its factorization.

998969723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13226976, while the sum is 62.

The square root of 998969723 is about 31606.4822939852. The cubic root of 998969723 is about 999.6564563246.

The spelling of 998969723 in words is "nine hundred ninety-eight million, nine hundred sixty-nine thousand, seven hundred twenty-three".