84009734321 has 2 divisors, whose sum is σ = 84009734322. Its totient is φ = 84009734320.

The previous prime is 84009734261. The next prime is 84009734327. The reversal of 84009734321 is 12343790048.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74027526400 + 9982207921 = 272080^2 + 99911^2 .

It is a cyclic number.

It is not a de Polignac number, because 84009734321 - 2⁶ = 84009734257 is a prime.

It is not a weakly prime, because it can be changed into another prime (84009734327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42004867160 + 42004867161.

It is an arithmetic number, because the mean of its divisors is an integer number (42004867161).

Almost surely, 2^84009734321 is an apocalyptic number.

It is an amenable number.

84009734321 is a deficient number, since it is larger than the sum of its proper divisors (1).

84009734321 is an equidigital number, since it uses as much as digits as its factorization.

84009734321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 41.

The spelling of 84009734321 in words is "eighty-four billion, nine million, seven hundred thirty-four thousand, three hundred twenty-one".