84226861 has 2 divisors, whose sum is σ = 84226862. Its totient is φ = 84226860.

The previous prime is 84226819. The next prime is 84226871. The reversal of 84226861 is 16862248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54316900 + 29909961 = 7370^2 + 5469^2 .

It is a cyclic number.

It is not a de Polignac number, because 84226861 - 2⁷ = 84226733 is a prime.

It is a super-2 number, since 2×84226861² = 14188328227826642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 84226861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84226811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42113430 + 42113431.

It is an arithmetic number, because the mean of its divisors is an integer number (42113431).

Almost surely, 2^84226861 is an apocalyptic number.

It is an amenable number.

84226861 is a deficient number, since it is larger than the sum of its proper divisors (1).

84226861 is an equidigital number, since it uses as much as digits as its factorization.

84226861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36864, while the sum is 37.

The square root of 84226861 is about 9177.5193271385. The cubic root of 84226861 is about 438.3458223232.

The spelling of 84226861 in words is "eighty-four million, two hundred twenty-six thousand, eight hundred sixty-one".