84420841 has 2 divisors, whose sum is σ = 84420842. Its totient is φ = 84420840.

The previous prime is 84420811. The next prime is 84420851. The reversal of 84420841 is 14802448.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84107241 + 313600 = 9171^2 + 560^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84420841 is a prime.

It is not a weakly prime, because it can be changed into another prime (84420811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42210420 + 42210421.

It is an arithmetic number, because the mean of its divisors is an integer number (42210421).

Almost surely, 2^84420841 is an apocalyptic number.

It is an amenable number.

84420841 is a deficient number, since it is larger than the sum of its proper divisors (1).

84420841 is an equidigital number, since it uses as much as digits as its factorization.

84420841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8192, while the sum is 31.

The square root of 84420841 is about 9188.0814645931. The cubic root of 84420841 is about 438.6820774014.

The spelling of 84420841 in words is "eighty-four million, four hundred twenty thousand, eight hundred forty-one".