84746561 has 2 divisors, whose sum is σ = 84746562. Its totient is φ = 84746560.

The previous prime is 84746533. The next prime is 84746579. The reversal of 84746561 is 16564748.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77986561 + 6760000 = 8831^2 + 2600^2 .

It is a cyclic number.

It is not a de Polignac number, because 84746561 - 2²² = 80552257 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (84746531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42373280 + 42373281.

It is an arithmetic number, because the mean of its divisors is an integer number (42373281).

Almost surely, 2^84746561 is an apocalyptic number.

It is an amenable number.

84746561 is a deficient number, since it is larger than the sum of its proper divisors (1).

84746561 is an equidigital number, since it uses as much as digits as its factorization.

84746561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 41.

The square root of 84746561 is about 9205.7895370251. The cubic root of 84746561 is about 439.2455407609.

The spelling of 84746561 in words is "eighty-four million, seven hundred forty-six thousand, five hundred sixty-one".