80976409 has 2 divisors, whose sum is σ = 80976410. Its totient is φ = 80976408.

The previous prime is 80976407. The next prime is 80976419. The reversal of 80976409 is 90467908.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63361600 + 17614809 = 7960^2 + 4197^2 .

It is a cyclic number.

It is not a de Polignac number, because 80976409 - 2¹ = 80976407 is a prime.

Together with 80976407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (80976407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40488204 + 40488205.

It is an arithmetic number, because the mean of its divisors is an integer number (40488205).

Almost surely, 2^80976409 is an apocalyptic number.

It is an amenable number.

80976409 is a deficient number, since it is larger than the sum of its proper divisors (1).

80976409 is an equidigital number, since it uses as much as digits as its factorization.

80976409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 80976409 is about 8998.6892934471. The cubic root of 80976409 is about 432.6328619400.

The spelling of 80976409 in words is "eighty million, nine hundred seventy-six thousand, four hundred nine".