84450517 has 2 divisors, whose sum is σ = 84450518. Its totient is φ = 84450516.

The previous prime is 84450473. The next prime is 84450521. The reversal of 84450517 is 71505448.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63345681 + 21104836 = 7959^2 + 4594^2 .

It is a cyclic number.

It is not a de Polignac number, because 84450517 - 2⁷ = 84450389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84450547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42225258 + 42225259.

It is an arithmetic number, because the mean of its divisors is an integer number (42225259).

Almost surely, 2^84450517 is an apocalyptic number.

It is an amenable number.

84450517 is a deficient number, since it is larger than the sum of its proper divisors (1).

84450517 is an equidigital number, since it uses as much as digits as its factorization.

84450517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22400, while the sum is 34.

The square root of 84450517 is about 9189.6962408994. The cubic root of 84450517 is about 438.7334738894.

The spelling of 84450517 in words is "eighty-four million, four hundred fifty thousand, five hundred seventeen".