86705537 has 2 divisors, whose sum is σ = 86705538. Its totient is φ = 86705536.

The previous prime is 86705533. The next prime is 86705539. The reversal of 86705537 is 73550768.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86694721 + 10816 = 9311^2 + 104^2 .

It is a cyclic number.

It is not a de Polignac number, because 86705537 - 2² = 86705533 is a prime.

Together with 86705539, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 86705494 and 86705503.

It is not a weakly prime, because it can be changed into another prime (86705533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43352768 + 43352769.

It is an arithmetic number, because the mean of its divisors is an integer number (43352769).

Almost surely, 2^86705537 is an apocalyptic number.

It is an amenable number.

86705537 is a deficient number, since it is larger than the sum of its proper divisors (1).

86705537 is an equidigital number, since it uses as much as digits as its factorization.

86705537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 176400, while the sum is 41.

The square root of 86705537 is about 9311.5808002723. The cubic root of 86705537 is about 442.6042815501.

The spelling of 86705537 in words is "eighty-six million, seven hundred five thousand, five hundred thirty-seven".