816612497 has 2 divisors, whose sum is σ = 816612498. Its totient is φ = 816612496.

The previous prime is 816612487. The next prime is 816612523. The reversal of 816612497 is 794216618.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 424730881 + 391881616 = 20609^2 + 19796^2 .

It is a cyclic number.

It is not a de Polignac number, because 816612497 - 2¹⁴ = 816596113 is a prime.

It is not a weakly prime, because it can be changed into another prime (816612427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 408306248 + 408306249.

It is an arithmetic number, because the mean of its divisors is an integer number (408306249).

Almost surely, 2^816612497 is an apocalyptic number.

It is an amenable number.

816612497 is a deficient number, since it is larger than the sum of its proper divisors (1).

816612497 is an equidigital number, since it uses as much as digits as its factorization.

816612497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 44.

The square root of 816612497 is about 28576.4325450186. The cubic root of 816612497 is about 934.6994933508.

The spelling of 816612497 in words is "eight hundred sixteen million, six hundred twelve thousand, four hundred ninety-seven".