84913678321 has 2 divisors, whose sum is σ = 84913678322. Its totient is φ = 84913678320.

The previous prime is 84913678309. The next prime is 84913678331. The reversal of 84913678321 is 12387631948.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84436736400 + 476941921 = 290580^2 + 21839^2 .

It is a cyclic number.

It is not a de Polignac number, because 84913678321 - 2²¹ = 84911581169 is a prime.

It is not a weakly prime, because it can be changed into another prime (84913678331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42456839160 + 42456839161.

It is an arithmetic number, because the mean of its divisors is an integer number (42456839161).

Almost surely, 2^84913678321 is an apocalyptic number.

It is an amenable number.

84913678321 is a deficient number, since it is larger than the sum of its proper divisors (1).

84913678321 is an equidigital number, since it uses as much as digits as its factorization.

84913678321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 52.

The spelling of 84913678321 in words is "eighty-four billion, nine hundred thirteen million, six hundred seventy-eight thousand, three hundred twenty-one".