86785961 has 2 divisors, whose sum is σ = 86785962. Its totient is φ = 86785960.

The previous prime is 86785949. The next prime is 86785973. The reversal of 86785961 is 16958768.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (86785949) and next prime (86785973).

It can be written as a sum of positive squares in only one way, i.e., 85747600 + 1038361 = 9260^2 + 1019^2 .

It is a cyclic number.

It is not a de Polignac number, because 86785961 - 2¹⁰ = 86784937 is a prime.

It is not a weakly prime, because it can be changed into another prime (86785931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43392980 + 43392981.

It is an arithmetic number, because the mean of its divisors is an integer number (43392981).

Almost surely, 2^86785961 is an apocalyptic number.

It is an amenable number.

86785961 is a deficient number, since it is larger than the sum of its proper divisors (1).

86785961 is an equidigital number, since it uses as much as digits as its factorization.

86785961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 50.

The square root of 86785961 is about 9315.8982927037. The cubic root of 86785961 is about 442.7410856032.

The spelling of 86785961 in words is "eighty-six million, seven hundred eighty-five thousand, nine hundred sixty-one".