86620717 has 2 divisors, whose sum is σ = 86620718. Its totient is φ = 86620716.

The previous prime is 86620669. The next prime is 86620733. The reversal of 86620717 is 71702668.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77686596 + 8934121 = 8814^2 + 2989^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86620717 is a prime.

It is a super-2 number, since 2×86620717² = 15006297227188178, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86620777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43310358 + 43310359.

It is an arithmetic number, because the mean of its divisors is an integer number (43310359).

Almost surely, 2^86620717 is an apocalyptic number.

It is an amenable number.

86620717 is a deficient number, since it is larger than the sum of its proper divisors (1).

86620717 is an equidigital number, since it uses as much as digits as its factorization.

86620717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 86620717 is about 9307.0251423320. The cubic root of 86620717 is about 442.4599080576.

The spelling of 86620717 in words is "eighty-six million, six hundred twenty thousand, seven hundred seventeen".