84518957 has 2 divisors, whose sum is σ = 84518958. Its totient is φ = 84518956.

The previous prime is 84518953. The next prime is 84518969. The reversal of 84518957 is 75981548.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54257956 + 30261001 = 7366^2 + 5501^2 .

It is a cyclic number.

It is not a de Polignac number, because 84518957 - 2² = 84518953 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84518953) 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, 42259478 + 42259479.

It is an arithmetic number, because the mean of its divisors is an integer number (42259479).

Almost surely, 2^84518957 is an apocalyptic number.

It is an amenable number.

84518957 is a deficient number, since it is larger than the sum of its proper divisors (1).

84518957 is an equidigital number, since it uses as much as digits as its factorization.

84518957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 403200, while the sum is 47.

The square root of 84518957 is about 9193.4192224656. The cubic root of 84518957 is about 438.8519606760.

The spelling of 84518957 in words is "eighty-four million, five hundred eighteen thousand, nine hundred fifty-seven".