84869957 has 2 divisors, whose sum is σ = 84869958. Its totient is φ = 84869956.

The previous prime is 84869951. The next prime is 84869969. The reversal of 84869957 is 75996848.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71334916 + 13535041 = 8446^2 + 3679^2 .

It is a cyclic number.

It is not a de Polignac number, because 84869957 - 2¹⁰ = 84868933 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84869951) 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, 42434978 + 42434979.

It is an arithmetic number, because the mean of its divisors is an integer number (42434979).

Almost surely, 2^84869957 is an apocalyptic number.

It is an amenable number.

84869957 is a deficient number, since it is larger than the sum of its proper divisors (1).

84869957 is an equidigital number, since it uses as much as digits as its factorization.

84869957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4354560, while the sum is 56.

The square root of 84869957 is about 9212.4891858824. The cubic root of 84869957 is about 439.4586265257.

The spelling of 84869957 in words is "eighty-four million, eight hundred sixty-nine thousand, nine hundred fifty-seven".