999685223 has 2 divisors, whose sum is σ = 999685224. Its totient is φ = 999685222.

The previous prime is 999685217. The next prime is 999685229. The reversal of 999685223 is 322586999.

It is a balanced prime because it is at equal distance from previous prime (999685217) and next prime (999685229).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999685223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999685229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499842611 + 499842612.

It is an arithmetic number, because the mean of its divisors is an integer number (499842612).

Almost surely, 2^999685223 is an apocalyptic number.

999685223 is a deficient number, since it is larger than the sum of its proper divisors (1).

999685223 is an equidigital number, since it uses as much as digits as its factorization.

999685223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2099520, while the sum is 53.

The square root of 999685223 is about 31617.7991485809. The cubic root of 999685223 is about 999.8950633220.

The spelling of 999685223 in words is "nine hundred ninety-nine million, six hundred eighty-five thousand, two hundred twenty-three".