84711257 has 2 divisors, whose sum is σ = 84711258. Its totient is φ = 84711256.

The previous prime is 84711229. The next prime is 84711271. The reversal of 84711257 is 75211748.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58537801 + 26173456 = 7651^2 + 5116^2 .

It is a cyclic number.

It is not a de Polignac number, because 84711257 - 2¹⁶ = 84645721 is a prime.

It is not a weakly prime, because it can be changed into another prime (84711227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42355628 + 42355629.

It is an arithmetic number, because the mean of its divisors is an integer number (42355629).

Almost surely, 2^84711257 is an apocalyptic number.

It is an amenable number.

84711257 is a deficient number, since it is larger than the sum of its proper divisors (1).

84711257 is an equidigital number, since it uses as much as digits as its factorization.

84711257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15680, while the sum is 35.

The square root of 84711257 is about 9203.8718483038. The cubic root of 84711257 is about 439.1845381738.

The spelling of 84711257 in words is "eighty-four million, seven hundred eleven thousand, two hundred fifty-seven".