87361321 has 2 divisors, whose sum is σ = 87361322. Its totient is φ = 87361320.

The previous prime is 87361213. The next prime is 87361343. The reversal of 87361321 is 12316378.

Together with previous prime (87361213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87216921 + 144400 = 9339^2 + 380^2 .

It is a cyclic number.

It is not a de Polignac number, because 87361321 - 2¹³ = 87353129 is a prime.

It is not a weakly prime, because it can be changed into another prime (87361121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43680660 + 43680661.

It is an arithmetic number, because the mean of its divisors is an integer number (43680661).

Almost surely, 2^87361321 is an apocalyptic number.

It is an amenable number.

87361321 is a deficient number, since it is larger than the sum of its proper divisors (1).

87361321 is an equidigital number, since it uses as much as digits as its factorization.

87361321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

The square root of 87361321 is about 9346.7278231475. The cubic root of 87361321 is about 443.7173365894.

Adding to 87361321 its reverse (12316378), we get a palindrome (99677699).

The spelling of 87361321 in words is "eighty-seven million, three hundred sixty-one thousand, three hundred twenty-one".