84091849 has 2 divisors, whose sum is σ = 84091850. Its totient is φ = 84091848.

The previous prime is 84091831. The next prime is 84091927. The reversal of 84091849 is 94819048.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82228624 + 1863225 = 9068^2 + 1365^2 .

It is a cyclic number.

It is not a de Polignac number, because 84091849 - 2⁵ = 84091817 is a prime.

It is not a weakly prime, because it can be changed into another prime (84091829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42045924 + 42045925.

It is an arithmetic number, because the mean of its divisors is an integer number (42045925).

Almost surely, 2^84091849 is an apocalyptic number.

It is an amenable number.

84091849 is a deficient number, since it is larger than the sum of its proper divisors (1).

84091849 is an equidigital number, since it uses as much as digits as its factorization.

84091849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 84091849 is about 9170.1607946644. The cubic root of 84091849 is about 438.1114806272. Note that the first 3 decimals are identical.

The spelling of 84091849 in words is "eighty-four million, ninety-one thousand, eight hundred forty-nine".