72831817 has 2 divisors, whose sum is σ = 72831818. Its totient is φ = 72831816.

The previous prime is 72831793. The next prime is 72831877. The reversal of 72831817 is 71813827.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54479161 + 18352656 = 7381^2 + 4284^2 .

It is a cyclic number.

It is not a de Polignac number, because 72831817 - 2¹¹ = 72829769 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72831877) 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, 36415908 + 36415909.

It is an arithmetic number, because the mean of its divisors is an integer number (36415909).

Almost surely, 2^72831817 is an apocalyptic number.

It is an amenable number.

72831817 is a deficient number, since it is larger than the sum of its proper divisors (1).

72831817 is an equidigital number, since it uses as much as digits as its factorization.

72831817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18816, while the sum is 37.

The square root of 72831817 is about 8534.1559043645. The cubic root of 72831817 is about 417.6127167662.

The spelling of 72831817 in words is "seventy-two million, eight hundred thirty-one thousand, eight hundred seventeen".