87463561 has 2 divisors, whose sum is σ = 87463562. Its totient is φ = 87463560.

The previous prime is 87463559. The next prime is 87463603. The reversal of 87463561 is 16536478.

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., 74995600 + 12467961 = 8660^2 + 3531^2 .

It is a cyclic number.

It is not a de Polignac number, because 87463561 - 2¹ = 87463559 is a prime.

Together with 87463559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (87463501) 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, 43731780 + 43731781.

It is an arithmetic number, because the mean of its divisors is an integer number (43731781).

Almost surely, 2^87463561 is an apocalyptic number.

It is an amenable number.

87463561 is a deficient number, since it is larger than the sum of its proper divisors (1).

87463561 is an equidigital number, since it uses as much as digits as its factorization.

87463561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 40.

The square root of 87463561 is about 9352.1955176311. The cubic root of 87463561 is about 443.8903650118.

The spelling of 87463561 in words is "eighty-seven million, four hundred sixty-three thousand, five hundred sixty-one".