87361513 has 2 divisors, whose sum is σ = 87361514. Its totient is φ = 87361512.

The previous prime is 87361507. The next prime is 87361537. The reversal of 87361513 is 31516378.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76947984 + 10413529 = 8772^2 + 3227^2 .

It is a cyclic number.

It is not a de Polignac number, because 87361513 - 2¹⁷ = 87230441 is a prime.

It is not a weakly prime, because it can be changed into another prime (87361553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43680756 + 43680757.

It is an arithmetic number, because the mean of its divisors is an integer number (43680757).

Almost surely, 2^87361513 is an apocalyptic number.

It is an amenable number.

87361513 is a deficient number, since it is larger than the sum of its proper divisors (1).

87361513 is an equidigital number, since it uses as much as digits as its factorization.

87361513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 34.

The square root of 87361513 is about 9346.7380941160. The cubic root of 87361513 is about 443.7176616519.

The spelling of 87361513 in words is "eighty-seven million, three hundred sixty-one thousand, five hundred thirteen".