84089021911 has 2 divisors, whose sum is σ = 84089021912. Its totient is φ = 84089021910.

The previous prime is 84089021903. The next prime is 84089021923. The reversal of 84089021911 is 11912098048.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84089021911 - 2³ = 84089021903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84089021971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42044510955 + 42044510956.

It is an arithmetic number, because the mean of its divisors is an integer number (42044510956).

Almost surely, 2^84089021911 is an apocalyptic number.

84089021911 is a deficient number, since it is larger than the sum of its proper divisors (1).

84089021911 is an equidigital number, since it uses as much as digits as its factorization.

84089021911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 43.

The spelling of 84089021911 in words is "eighty-four billion, eighty-nine million, twenty-one thousand, nine hundred eleven".