87646469 has 2 divisors, whose sum is σ = 87646470. Its totient is φ = 87646468.

The previous prime is 87646463. The next prime is 87646499. The reversal of 87646469 is 96464678.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64240225 + 23406244 = 8015^2 + 4838^2 .

It is a cyclic number.

It is not a de Polignac number, because 87646469 - 2⁴ = 87646453 is a prime.

It is a super-2 number, since 2×87646469² = 15363807056335922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87646463) 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, 43823234 + 43823235.

It is an arithmetic number, because the mean of its divisors is an integer number (43823235).

Almost surely, 2^87646469 is an apocalyptic number.

It is an amenable number.

87646469 is a deficient number, since it is larger than the sum of its proper divisors (1).

87646469 is an equidigital number, since it uses as much as digits as its factorization.

87646469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1741824, while the sum is 50.

The square root of 87646469 is about 9361.9692906995. The cubic root of 87646469 is about 444.1995778494.

The spelling of 87646469 in words is "eighty-seven million, six hundred forty-six thousand, four hundred sixty-nine".