999240317 has 2 divisors, whose sum is σ = 999240318. Its totient is φ = 999240316.

The previous prime is 999240301. The next prime is 999240383. The reversal of 999240317 is 713042999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 879359716 + 119880601 = 29654^2 + 10949^2 .

It is a cyclic number.

It is not a de Polignac number, because 999240317 - 2⁴ = 999240301 is a prime.

It is a super-2 number, since 2×999240317² = 1996962422236520978, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999240917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499620158 + 499620159.

It is an arithmetic number, because the mean of its divisors is an integer number (499620159).

Almost surely, 2^999240317 is an apocalyptic number.

It is an amenable number.

999240317 is a deficient number, since it is larger than the sum of its proper divisors (1).

999240317 is an equidigital number, since it uses as much as digits as its factorization.

999240317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122472, while the sum is 44.

The square root of 999240317 is about 31610.7626766581. The cubic root of 999240317 is about 999.7467081820.

The spelling of 999240317 in words is "nine hundred ninety-nine million, two hundred forty thousand, three hundred seventeen".