84405311 has 2 divisors, whose sum is σ = 84405312. Its totient is φ = 84405310.

The previous prime is 84405271. The next prime is 84405313. The reversal of 84405311 is 11350448.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84405311 - 2⁶ = 84405247 is a prime.

Together with 84405313, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84405313) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42202655 + 42202656.

It is an arithmetic number, because the mean of its divisors is an integer number (42202656).

Almost surely, 2^84405311 is an apocalyptic number.

84405311 is a deficient number, since it is larger than the sum of its proper divisors (1).

84405311 is an equidigital number, since it uses as much as digits as its factorization.

84405311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 84405311 is about 9187.2363091411. The cubic root of 84405311 is about 438.6551758671.

Adding to 84405311 its reverse (11350448), we get a palindrome (95755759).

The spelling of 84405311 in words is "eighty-four million, four hundred five thousand, three hundred eleven".