85844651 has 2 divisors, whose sum is σ = 85844652. Its totient is φ = 85844650.

The previous prime is 85844623. The next prime is 85844653. The reversal of 85844651 is 15644858.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85844651 - 2¹⁸ = 85582507 is a prime.

It is a Sophie Germain prime.

Together with 85844653, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 85844599 and 85844608.

It is not a weakly prime, because it can be changed into another prime (85844653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42922325 + 42922326.

It is an arithmetic number, because the mean of its divisors is an integer number (42922326).

Almost surely, 2^85844651 is an apocalyptic number.

85844651 is a deficient number, since it is larger than the sum of its proper divisors (1).

85844651 is an equidigital number, since it uses as much as digits as its factorization.

85844651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 153600, while the sum is 41.

The square root of 85844651 is about 9265.2388528305. The cubic root of 85844651 is about 441.1345564932.

The spelling of 85844651 in words is "eighty-five million, eight hundred forty-four thousand, six hundred fifty-one".