86697973 has 2 divisors, whose sum is σ = 86697974. Its totient is φ = 86697972.

The previous prime is 86697959. The next prime is 86697991. The reversal of 86697973 is 37979668.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81306289 + 5391684 = 9017^2 + 2322^2 .

It is a cyclic number.

It is not a de Polignac number, because 86697973 - 2¹⁷ = 86566901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86697913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43348986 + 43348987.

It is an arithmetic number, because the mean of its divisors is an integer number (43348987).

Almost surely, 2^86697973 is an apocalyptic number.

It is an amenable number.

86697973 is a deficient number, since it is larger than the sum of its proper divisors (1).

86697973 is an equidigital number, since it uses as much as digits as its factorization.

86697973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3429216, while the sum is 55.

The square root of 86697973 is about 9311.1746305179. The cubic root of 86697973 is about 442.5914105683.

The spelling of 86697973 in words is "eighty-six million, six hundred ninety-seven thousand, nine hundred seventy-three".