86551693 has 2 divisors, whose sum is σ = 86551694. Its totient is φ = 86551692.

The previous prime is 86551681. The next prime is 86551723. The reversal of 86551693 is 39615568.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86359849 + 191844 = 9293^2 + 438^2 .

It is a cyclic number.

It is not a de Polignac number, because 86551693 - 2⁹ = 86551181 is a prime.

It is a super-2 number, since 2×86551693² = 14982391122332498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86551613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43275846 + 43275847.

It is an arithmetic number, because the mean of its divisors is an integer number (43275847).

Almost surely, 2^86551693 is an apocalyptic number.

It is an amenable number.

86551693 is a deficient number, since it is larger than the sum of its proper divisors (1).

86551693 is an equidigital number, since it uses as much as digits as its factorization.

86551693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 194400, while the sum is 43.

The square root of 86551693 is about 9303.3162366975. The cubic root of 86551693 is about 442.3423516215.

The spelling of 86551693 in words is "eighty-six million, five hundred fifty-one thousand, six hundred ninety-three".