84677009 has 2 divisors, whose sum is σ = 84677010. Its totient is φ = 84677008.

The previous prime is 84676973. The next prime is 84677057. The reversal of 84677009 is 90077648.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52243984 + 32433025 = 7228^2 + 5695^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84677009 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (84677069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42338504 + 42338505.

It is an arithmetic number, because the mean of its divisors is an integer number (42338505).

Almost surely, 2^84677009 is an apocalyptic number.

It is an amenable number.

84677009 is a deficient number, since it is larger than the sum of its proper divisors (1).

84677009 is an equidigital number, since it uses as much as digits as its factorization.

84677009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 84677009 is about 9202.0111388761. The cubic root of 84677009 is about 439.1253440750.

The spelling of 84677009 in words is "eighty-four million, six hundred seventy-seven thousand, nine".