823478497 has 2 divisors, whose sum is σ = 823478498. Its totient is φ = 823478496.

The previous prime is 823478459. The next prime is 823478531. The reversal of 823478497 is 794874328.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 701243361 + 122235136 = 26481^2 + 11056^2 .

It is a cyclic number.

It is not a de Polignac number, because 823478497 - 2¹⁵ = 823445729 is a prime.

It is not a weakly prime, because it can be changed into another prime (823478597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411739248 + 411739249.

It is an arithmetic number, because the mean of its divisors is an integer number (411739249).

Almost surely, 2^823478497 is an apocalyptic number.

It is an amenable number.

823478497 is a deficient number, since it is larger than the sum of its proper divisors (1).

823478497 is an equidigital number, since it uses as much as digits as its factorization.

823478497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2709504, while the sum is 52.

The square root of 823478497 is about 28696.3150421792. The cubic root of 823478497 is about 937.3118070130.

The spelling of 823478497 in words is "eight hundred twenty-three million, four hundred seventy-eight thousand, four hundred ninety-seven".