84471946381 has 2 divisors, whose sum is σ = 84471946382. Its totient is φ = 84471946380.

The previous prime is 84471946343. The next prime is 84471946393. The reversal of 84471946381 is 18364917448.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77650838281 + 6821108100 = 278659^2 + 82590^2 .

It is a cyclic number.

It is not a de Polignac number, because 84471946381 - 2⁷ = 84471946253 is a prime.

It is a super-2 number, since 2×84471946381² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84471916381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42235973190 + 42235973191.

It is an arithmetic number, because the mean of its divisors is an integer number (42235973191).

Almost surely, 2^84471946381 is an apocalyptic number.

It is an amenable number.

84471946381 is a deficient number, since it is larger than the sum of its proper divisors (1).

84471946381 is an equidigital number, since it uses as much as digits as its factorization.

84471946381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4644864, while the sum is 55.

The spelling of 84471946381 in words is "eighty-four billion, four hundred seventy-one million, nine hundred forty-six thousand, three hundred eighty-one".