86825917 has 2 divisors, whose sum is σ = 86825918. Its totient is φ = 86825916.

The previous prime is 86825863. The next prime is 86825929. The reversal of 86825917 is 71952868.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59305401 + 27520516 = 7701^2 + 5246^2 .

It is a cyclic number.

It is not a de Polignac number, because 86825917 - 2⁷ = 86825789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86825617) 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, 43412958 + 43412959.

It is an arithmetic number, because the mean of its divisors is an integer number (43412959).

Almost surely, 2^86825917 is an apocalyptic number.

It is an amenable number.

86825917 is a deficient number, since it is larger than the sum of its proper divisors (1).

86825917 is an equidigital number, since it uses as much as digits as its factorization.

86825917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 241920, while the sum is 46.

The square root of 86825917 is about 9318.0425519526. The cubic root of 86825917 is about 442.8090207411.

The spelling of 86825917 in words is "eighty-six million, eight hundred twenty-five thousand, nine hundred seventeen".