87996409 has 2 divisors, whose sum is σ = 87996410. Its totient is φ = 87996408.

The previous prime is 87996401. The next prime is 87996427. The reversal of 87996409 is 90469978.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81090025 + 6906384 = 9005^2 + 2628^2 .

It is a cyclic number.

It is not a de Polignac number, because 87996409 - 2³ = 87996401 is a prime.

It is not a weakly prime, because it can be changed into another prime (87996401) 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, 43998204 + 43998205.

It is an arithmetic number, because the mean of its divisors is an integer number (43998205).

Almost surely, 2^87996409 is an apocalyptic number.

It is an amenable number.

87996409 is a deficient number, since it is larger than the sum of its proper divisors (1).

87996409 is an equidigital number, since it uses as much as digits as its factorization.

87996409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 979776, while the sum is 52.

The square root of 87996409 is about 9380.6401167511. The cubic root of 87996409 is about 444.7899677948.

The spelling of 87996409 in words is "eighty-seven million, nine hundred ninety-six thousand, four hundred nine".