87353509 has 2 divisors, whose sum is σ = 87353510. Its totient is φ = 87353508.

The previous prime is 87353503. The next prime is 87353527. The reversal of 87353509 is 90535378.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86397025 + 956484 = 9295^2 + 978^2 .

It is a cyclic number.

It is not a de Polignac number, because 87353509 - 2⁵ = 87353477 is a prime.

It is a super-2 number, since 2×87353509² = 15261271069226162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87353503) 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, 43676754 + 43676755.

It is an arithmetic number, because the mean of its divisors is an integer number (43676755).

Almost surely, 2^87353509 is an apocalyptic number.

It is an amenable number.

87353509 is a deficient number, since it is larger than the sum of its proper divisors (1).

87353509 is an equidigital number, since it uses as much as digits as its factorization.

87353509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 113400, while the sum is 40.

The square root of 87353509 is about 9346.3099135434. The cubic root of 87353509 is about 443.7041102053.

The spelling of 87353509 in words is "eighty-seven million, three hundred fifty-three thousand, five hundred nine".