86824961 has 2 divisors, whose sum is σ = 86824962. Its totient is φ = 86824960.

The previous prime is 86824957. The next prime is 86824963. The reversal of 86824961 is 16942868.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79834225 + 6990736 = 8935^2 + 2644^2 .

It is a cyclic number.

It is not a de Polignac number, because 86824961 - 2² = 86824957 is a prime.

It is a Sophie Germain prime.

Together with 86824963, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (86824963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43412480 + 43412481.

It is an arithmetic number, because the mean of its divisors is an integer number (43412481).

Almost surely, 2^86824961 is an apocalyptic number.

It is an amenable number.

86824961 is a deficient number, since it is larger than the sum of its proper divisors (1).

86824961 is an equidigital number, since it uses as much as digits as its factorization.

86824961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 44.

The square root of 86824961 is about 9317.9912534838. The cubic root of 86824961 is about 442.8073955467.

The spelling of 86824961 in words is "eighty-six million, eight hundred twenty-four thousand, nine hundred sixty-one".