86912215409 has 2 divisors, whose sum is σ = 86912215410. Its totient is φ = 86912215408.

The previous prime is 86912215331. The next prime is 86912215427. The reversal of 86912215409 is 90451221968.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81754821184 + 5157394225 = 285928^2 + 71815^2 .

It is a cyclic number.

It is not a de Polignac number, because 86912215409 - 2⁸ = 86912215153 is a prime.

It is not a weakly prime, because it can be changed into another prime (86912214409) 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, 43456107704 + 43456107705.

It is an arithmetic number, because the mean of its divisors is an integer number (43456107705).

Almost surely, 2^86912215409 is an apocalyptic number.

It is an amenable number.

86912215409 is a deficient number, since it is larger than the sum of its proper divisors (1).

86912215409 is an equidigital number, since it uses as much as digits as its factorization.

86912215409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 311040, while the sum is 47.

The spelling of 86912215409 in words is "eighty-six billion, nine hundred twelve million, two hundred fifteen thousand, four hundred nine".