84122317457 has 2 divisors, whose sum is σ = 84122317458. Its totient is φ = 84122317456.

The previous prime is 84122317397. The next prime is 84122317471. The reversal of 84122317457 is 75471322148.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57281720896 + 26840596561 = 239336^2 + 163831^2 .

It is a cyclic number.

It is not a de Polignac number, because 84122317457 - 2¹⁶ = 84122251921 is a prime.

It is not a weakly prime, because it can be changed into another prime (84122367457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42061158728 + 42061158729.

It is an arithmetic number, because the mean of its divisors is an integer number (42061158729).

Almost surely, 2^84122317457 is an apocalyptic number.

It is an amenable number.

84122317457 is a deficient number, since it is larger than the sum of its proper divisors (1).

84122317457 is an equidigital number, since it uses as much as digits as its factorization.

84122317457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 376320, while the sum is 44.

The spelling of 84122317457 in words is "eighty-four billion, one hundred twenty-two million, three hundred seventeen thousand, four hundred fifty-seven".