86624777693 has 2 divisors, whose sum is σ = 86624777694. Its totient is φ = 86624777692.

The previous prime is 86624777647. The next prime is 86624777731. The reversal of 86624777693 is 39677742668.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78445926724 + 8178850969 = 280082^2 + 90437^2 .

It is a cyclic number.

It is not a de Polignac number, because 86624777693 - 2¹⁰ = 86624776669 is a prime.

It is a super-2 number, since 2×86624777693² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86624777293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43312388846 + 43312388847.

It is an arithmetic number, because the mean of its divisors is an integer number (43312388847).

Almost surely, 2^86624777693 is an apocalyptic number.

It is an amenable number.

86624777693 is a deficient number, since it is larger than the sum of its proper divisors (1).

86624777693 is an equidigital number, since it uses as much as digits as its factorization.

86624777693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 128024064, while the sum is 65.

The spelling of 86624777693 in words is "eighty-six billion, six hundred twenty-four million, seven hundred seventy-seven thousand, six hundred ninety-three".