87318841 has 2 divisors, whose sum is σ = 87318842. Its totient is φ = 87318840.

The previous prime is 87318799. The next prime is 87318857. The reversal of 87318841 is 14881378.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70476025 + 16842816 = 8395^2 + 4104^2 .

It is a cyclic number.

It is not a de Polignac number, because 87318841 - 2⁷ = 87318713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87318794 and 87318803.

It is not a weakly prime, because it can be changed into another prime (87313841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43659420 + 43659421.

It is an arithmetic number, because the mean of its divisors is an integer number (43659421).

Almost surely, 2^87318841 is an apocalyptic number.

It is an amenable number.

87318841 is a deficient number, since it is larger than the sum of its proper divisors (1).

87318841 is an equidigital number, since it uses as much as digits as its factorization.

87318841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43008, while the sum is 40.

The square root of 87318841 is about 9344.4550937976. The cubic root of 87318841 is about 443.6454047999.

The spelling of 87318841 in words is "eighty-seven million, three hundred eighteen thousand, eight hundred forty-one".