861307417 has 2 divisors, whose sum is σ = 861307418. Its totient is φ = 861307416.

The previous prime is 861307327. The next prime is 861307439. The reversal of 861307417 is 714703168.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 542470681 + 318836736 = 23291^2 + 17856^2 .

It is a cyclic number.

It is not a de Polignac number, because 861307417 - 2¹¹ = 861305369 is a prime.

It is not a weakly prime, because it can be changed into another prime (861307817) 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, 430653708 + 430653709.

It is an arithmetic number, because the mean of its divisors is an integer number (430653709).

Almost surely, 2^861307417 is an apocalyptic number.

It is an amenable number.

861307417 is a deficient number, since it is larger than the sum of its proper divisors (1).

861307417 is an equidigital number, since it uses as much as digits as its factorization.

861307417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 861307417 is about 29348.0394064067. The cubic root of 861307417 is about 951.4502013521.

The spelling of 861307417 in words is "eight hundred sixty-one million, three hundred seven thousand, four hundred seventeen".