84168977 has 2 divisors, whose sum is σ = 84168978. Its totient is φ = 84168976.

The previous prime is 84168911. The next prime is 84168979. The reversal of 84168977 is 77986148.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49547521 + 34621456 = 7039^2 + 5884^2 .

It is a cyclic number.

It is not a de Polignac number, because 84168977 - 2¹² = 84164881 is a prime.

Together with 84168979, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (84168979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42084488 + 42084489.

It is an arithmetic number, because the mean of its divisors is an integer number (42084489).

Almost surely, 2^84168977 is an apocalyptic number.

It is an amenable number.

84168977 is a deficient number, since it is larger than the sum of its proper divisors (1).

84168977 is an equidigital number, since it uses as much as digits as its factorization.

84168977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 677376, while the sum is 50.

The square root of 84168977 is about 9174.3652096480. The cubic root of 84168977 is about 438.2453831681.

The spelling of 84168977 in words is "eighty-four million, one hundred sixty-eight thousand, nine hundred seventy-seven".