9976409 has 2 divisors, whose sum is σ = 9976410. Its totient is φ = 9976408.

The previous prime is 9976381. The next prime is 9976429. The reversal of 9976409 is 9046799.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8094025 + 1882384 = 2845^2 + 1372^2 .

It is a cyclic number.

It is not a de Polignac number, because 9976409 - 2²⁰ = 8927833 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9976409.

It is not a weakly prime, because it can be changed into another prime (9976429) 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, 4988204 + 4988205.

It is an arithmetic number, because the mean of its divisors is an integer number (4988205).

Almost surely, 2^9976409 is an apocalyptic number.

It is an amenable number.

9976409 is a deficient number, since it is larger than the sum of its proper divisors (1).

9976409 is an equidigital number, since it uses as much as digits as its factorization.

9976409 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 9976409 is about 3158.5453930567. The cubic root of 9976409 is about 215.2739180414.

The spelling of 9976409 in words is "nine million, nine hundred seventy-six thousand, four hundred nine".