86151817 has 2 divisors, whose sum is σ = 86151818. Its totient is φ = 86151816.

The previous prime is 86151809. The next prime is 86151827. The reversal of 86151817 is 71815168.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55115776 + 31036041 = 7424^2 + 5571^2 .

It is a cyclic number.

It is not a de Polignac number, because 86151817 - 2³ = 86151809 is a prime.

It is not a weakly prime, because it can be changed into another prime (86151827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43075908 + 43075909.

It is an arithmetic number, because the mean of its divisors is an integer number (43075909).

Almost surely, 2^86151817 is an apocalyptic number.

It is an amenable number.

86151817 is a deficient number, since it is larger than the sum of its proper divisors (1).

86151817 is an equidigital number, since it uses as much as digits as its factorization.

86151817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 37.

The square root of 86151817 is about 9281.8003102846. The cubic root of 86151817 is about 441.6600803733.

It can be divided in two parts, 86151 and 817, that added together give a palindrome (86968).

The spelling of 86151817 in words is "eighty-six million, one hundred fifty-one thousand, eight hundred seventeen".