87070717 has 2 divisors, whose sum is σ = 87070718. Its totient is φ = 87070716.

The previous prime is 87070693. The next prime is 87070759. The reversal of 87070717 is 71707078.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70375321 + 16695396 = 8389^2 + 4086^2 .

It is a cyclic number.

It is not a de Polignac number, because 87070717 - 2⁷ = 87070589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87070777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43535358 + 43535359.

It is an arithmetic number, because the mean of its divisors is an integer number (43535359).

Almost surely, 2^87070717 is an apocalyptic number.

It is an amenable number.

87070717 is a deficient number, since it is larger than the sum of its proper divisors (1).

87070717 is an equidigital number, since it uses as much as digits as its factorization.

87070717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19208, while the sum is 37.

The square root of 87070717 is about 9331.1691121745. The cubic root of 87070717 is about 443.2247872773.

It can be divided in two parts, 8707071 and 7, that added together give a palindrome (8707078).

The spelling of 87070717 in words is "eighty-seven million, seventy thousand, seven hundred seventeen".