996409489 has 2 divisors, whose sum is σ = 996409490.
Its totient is φ = 996409488.
The previous prime is 996409417. The next prime is 996409493. The reversal of 996409489 is 984904699.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 958955089 + 37454400 = 30967^2 + 6120^2
It is a cyclic number.
It is not a de Polignac number, because 996409489 - 217 = 996278417 is a prime.
It is a super-2 number, since 2×9964094892 = 1985663739538482242, which contains 22 as substring.
It is not a weakly prime, because it can be changed into another prime (996409499) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 498204744 + 498204745.
It is an arithmetic number, because the mean of its divisors is an integer number (498204745).
Almost surely, 2996409489 is an apocalyptic number.
It is an amenable number.
996409489 is a deficient number, since it is larger than the sum of its proper divisors (1).
996409489 is an equidigital number, since it uses as much as digits as its factorization.
996409489 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 5038848, while the sum is 58.
The square root of 996409489 is about 31565.9545871814.
The cubic root of 996409489 is about 998.8017277171.
The spelling of 996409489 in words is "nine hundred ninety-six million, four hundred nine thousand, four hundred eighty-nine".