85956643 has 2 divisors, whose sum is σ = 85956644. Its totient is φ = 85956642.

The previous prime is 85956601. The next prime is 85956649. The reversal of 85956643 is 34665958.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85956643 - 2²¹ = 83859491 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 85956593 and 85956602.

It is not a weakly prime, because it can be changed into another prime (85956649) 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, 42978321 + 42978322.

It is an arithmetic number, because the mean of its divisors is an integer number (42978322).

Almost surely, 2^85956643 is an apocalyptic number.

85956643 is a deficient number, since it is larger than the sum of its proper divisors (1).

85956643 is an equidigital number, since it uses as much as digits as its factorization.

85956643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 777600, while the sum is 46.

The square root of 85956643 is about 9271.2805480149. The cubic root of 85956643 is about 441.3263062507.

The spelling of 85956643 in words is "eighty-five million, nine hundred fifty-six thousand, six hundred forty-three".