84107977 has 2 divisors, whose sum is σ = 84107978. Its totient is φ = 84107976.

The previous prime is 84107971. The next prime is 84108019. The reversal of 84107977 is 77970148.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77862976 + 6245001 = 8824^2 + 2499^2 .

It is a cyclic number.

It is not a de Polignac number, because 84107977 - 2¹¹ = 84105929 is a prime.

It is not a weakly prime, because it can be changed into another prime (84107971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42053988 + 42053989.

It is an arithmetic number, because the mean of its divisors is an integer number (42053989).

Almost surely, 2^84107977 is an apocalyptic number.

It is an amenable number.

84107977 is a deficient number, since it is larger than the sum of its proper divisors (1).

84107977 is an equidigital number, since it uses as much as digits as its factorization.

84107977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 98784, while the sum is 43.

The square root of 84107977 is about 9171.0401263979. The cubic root of 84107977 is about 438.1394873459.

The spelling of 84107977 in words is "eighty-four million, one hundred seven thousand, nine hundred seventy-seven".