998810723 has 2 divisors, whose sum is σ = 998810724. Its totient is φ = 998810722.

The previous prime is 998810689. The next prime is 998810759. The reversal of 998810723 is 327018899.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 998810723 - 2²² = 994616419 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (998810773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499405361 + 499405362.

It is an arithmetic number, because the mean of its divisors is an integer number (499405362).

Almost surely, 2^998810723 is an apocalyptic number.

998810723 is a deficient number, since it is larger than the sum of its proper divisors (1).

998810723 is an equidigital number, since it uses as much as digits as its factorization.

998810723 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 998810723 is about 31603.9668870856. The cubic root of 998810723 is about 999.6034170761.

The spelling of 998810723 in words is "nine hundred ninety-eight million, eight hundred ten thousand, seven hundred twenty-three".