86762009 has 2 divisors, whose sum is σ = 86762010. Its totient is φ = 86762008.

The previous prime is 86761991. The next prime is 86762017. The reversal of 86762009 is 90026768.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80371225 + 6390784 = 8965^2 + 2528^2 .

It is a cyclic number.

It is not a de Polignac number, because 86762009 - 2¹⁶ = 86696473 is a prime.

It is not a weakly prime, because it can be changed into another prime (86762029) 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, 43381004 + 43381005.

It is an arithmetic number, because the mean of its divisors is an integer number (43381005).

Almost surely, 2^86762009 is an apocalyptic number.

It is an amenable number.

86762009 is a deficient number, since it is larger than the sum of its proper divisors (1).

86762009 is an equidigital number, since it uses as much as digits as its factorization.

86762009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 86762009 is about 9314.6126596869. The cubic root of 86762009 is about 442.7003512491.

The spelling of 86762009 in words is "eighty-six million, seven hundred sixty-two thousand, nine".