999928361 has 2 divisors, whose sum is σ = 999928362. Its totient is φ = 999928360.

The previous prime is 999928351. The next prime is 999928373. The reversal of 999928361 is 163829999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 864066025 + 135862336 = 29395^2 + 11656^2 .

It is a cyclic number.

It is not a de Polignac number, because 999928361 - 2⁶ = 999928297 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 999928297 and 999928306.

It is not a weakly prime, because it can be changed into another prime (999928351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499964180 + 499964181.

It is an arithmetic number, because the mean of its divisors is an integer number (499964181).

Almost surely, 2^999928361 is an apocalyptic number.

It is an amenable number.

999928361 is a deficient number, since it is larger than the sum of its proper divisors (1).

999928361 is an equidigital number, since it uses as much as digits as its factorization.

999928361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1889568, while the sum is 56.

The square root of 999928361 is about 31621.6438693500. The cubic root of 999928361 is about 999.9761197631.

The spelling of 999928361 in words is "nine hundred ninety-nine million, nine hundred twenty-eight thousand, three hundred sixty-one".