999909373 has 2 divisors, whose sum is σ = 999909374. Its totient is φ = 999909372.

The previous prime is 999909359. The next prime is 999909389. The reversal of 999909373 is 373909999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 960194169 + 39715204 = 30987^2 + 6302^2 .

It is an emirp because it is prime and its reverse (373909999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999909373 - 2¹⁷ = 999778301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999909343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499954686 + 499954687.

It is an arithmetic number, because the mean of its divisors is an integer number (499954687).

Almost surely, 2^999909373 is an apocalyptic number.

It is an amenable number.

999909373 is a deficient number, since it is larger than the sum of its proper divisors (1).

999909373 is an equidigital number, since it uses as much as digits as its factorization.

999909373 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3720087, while the sum is 58.

The square root of 999909373 is about 31621.3436305290. The cubic root of 999909373 is about 999.9697900874.

The spelling of 999909373 in words is "nine hundred ninety-nine million, nine hundred nine thousand, three hundred seventy-three".