80842849 has 2 divisors, whose sum is σ = 80842850. Its totient is φ = 80842848.

The previous prime is 80842847. The next prime is 80842877. The reversal of 80842849 is 94824808.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53875600 + 26967249 = 7340^2 + 5193^2 .

It is a cyclic number.

It is not a de Polignac number, because 80842849 - 2¹ = 80842847 is a prime.

Together with 80842847, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (80842847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40421424 + 40421425.

It is an arithmetic number, because the mean of its divisors is an integer number (40421425).

Almost surely, 2^80842849 is an apocalyptic number.

It is an amenable number.

80842849 is a deficient number, since it is larger than the sum of its proper divisors (1).

80842849 is an equidigital number, since it uses as much as digits as its factorization.

80842849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 147456, while the sum is 43.

The square root of 80842849 is about 8991.2651501332. The cubic root of 80842849 is about 432.3948739338.

The spelling of 80842849 in words is "eighty million, eight hundred forty-two thousand, eight hundred forty-nine".