86944961 has 2 divisors, whose sum is σ = 86944962. Its totient is φ = 86944960.

The previous prime is 86944943. The next prime is 86944973. The reversal of 86944961 is 16944968.

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., 81450625 + 5494336 = 9025^2 + 2344^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86944961 is a prime.

It is not a weakly prime, because it can be changed into another prime (86944981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43472480 + 43472481.

It is an arithmetic number, because the mean of its divisors is an integer number (43472481).

Almost surely, 2^86944961 is an apocalyptic number.

It is an amenable number.

86944961 is a deficient number, since it is larger than the sum of its proper divisors (1).

86944961 is an equidigital number, since it uses as much as digits as its factorization.

86944961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 47.

The square root of 86944961 is about 9324.4281862214. The cubic root of 86944961 is about 443.0113016801.

The spelling of 86944961 in words is "eighty-six million, nine hundred forty-four thousand, nine hundred sixty-one".