87447641 has 2 divisors, whose sum is σ = 87447642. Its totient is φ = 87447640.

The previous prime is 87447623. The next prime is 87447667. The reversal of 87447641 is 14674478.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81072016 + 6375625 = 9004^2 + 2525^2 .

It is a cyclic number.

It is not a de Polignac number, because 87447641 - 2¹⁰ = 87446617 is a prime.

It is not a weakly prime, because it can be changed into another prime (87447611) 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, 43723820 + 43723821.

It is an arithmetic number, because the mean of its divisors is an integer number (43723821).

Almost surely, 2^87447641 is an apocalyptic number.

It is an amenable number.

87447641 is a deficient number, since it is larger than the sum of its proper divisors (1).

87447641 is an equidigital number, since it uses as much as digits as its factorization.

87447641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 150528, while the sum is 41.

The square root of 87447641 is about 9351.3443418580. The cubic root of 87447641 is about 443.8634312681.

It can be divided in two parts, 87447 and 641, that added together give a palindrome (88088).

The spelling of 87447641 in words is "eighty-seven million, four hundred forty-seven thousand, six hundred forty-one".