9999994409 has 2 divisors, whose sum is σ = 9999994410. Its totient is φ = 9999994408.

The previous prime is 9999994393. The next prime is 9999994523. The reversal of 9999994409 is 9044999999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9666822400 + 333172009 = 98320^2 + 18253^2 .

It is a cyclic number.

It is not a de Polignac number, because 9999994409 - 2⁴ = 9999994393 is a prime.

It is a super-3 number, since 3×9999994409³ (a number of 31 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (9999997409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999997204 + 4999997205.

It is an arithmetic number, because the mean of its divisors is an integer number (4999997205).

Almost surely, 2^9999994409 is an apocalyptic number.

It is an amenable number.

9999994409 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999994409 is an equidigital number, since it uses as much as digits as its factorization.

9999994409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 76527504, while the sum is 71.

The square root of 9999994409 is about 99999.9720449961. The cubic root of 9999994409 is about 2154.4342885170.

The spelling of 9999994409 in words is "nine billion, nine hundred ninety-nine million, nine hundred ninety-four thousand, four hundred nine".