814724729321 has 2 divisors, whose sum is σ = 814724729322. Its totient is φ = 814724729320.

The previous prime is 814724729267. The next prime is 814724729369. The reversal of 814724729321 is 123927427418.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 681252144400 + 133472584921 = 825380^2 + 365339^2 .

It is a cyclic number.

It is not a de Polignac number, because 814724729321 - 2⁶ = 814724729257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 814724729321.

It is not a weakly prime, because it can be changed into another prime (814724723321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407362364660 + 407362364661.

It is an arithmetic number, because the mean of its divisors is an integer number (407362364661).

Almost surely, 2^814724729321 is an apocalyptic number.

It is an amenable number.

814724729321 is a deficient number, since it is larger than the sum of its proper divisors (1).

814724729321 is an equidigital number, since it uses as much as digits as its factorization.

814724729321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1354752, while the sum is 50.

The spelling of 814724729321 in words is "eight hundred fourteen billion, seven hundred twenty-four million, seven hundred twenty-nine thousand, three hundred twenty-one".