85851449 has 2 divisors, whose sum is σ = 85851450. Its totient is φ = 85851448.

The previous prime is 85851439. The next prime is 85851457. The reversal of 85851449 is 94415858.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79566400 + 6285049 = 8920^2 + 2507^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85851449 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85851419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42925724 + 42925725.

It is an arithmetic number, because the mean of its divisors is an integer number (42925725).

Almost surely, 2^85851449 is an apocalyptic number.

It is an amenable number.

85851449 is a deficient number, since it is larger than the sum of its proper divisors (1).

85851449 is an equidigital number, since it uses as much as digits as its factorization.

85851449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 230400, while the sum is 44.

The square root of 85851449 is about 9265.6057006544. The cubic root of 85851449 is about 441.1462006027.

The spelling of 85851449 in words is "eighty-five million, eight hundred fifty-one thousand, four hundred forty-nine".