823650397 has 2 divisors, whose sum is σ = 823650398. Its totient is φ = 823650396.

The previous prime is 823650383. The next prime is 823650403. The reversal of 823650397 is 793056328.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 747803716 + 75846681 = 27346^2 + 8709^2 .

It is a cyclic number.

It is not a de Polignac number, because 823650397 - 2¹¹ = 823648349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (823650307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411825198 + 411825199.

It is an arithmetic number, because the mean of its divisors is an integer number (411825199).

Almost surely, 2^823650397 is an apocalyptic number.

It is an amenable number.

823650397 is a deficient number, since it is larger than the sum of its proper divisors (1).

823650397 is an equidigital number, since it uses as much as digits as its factorization.

823650397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 823650397 is about 28699.3100439714. The cubic root of 823650397 is about 937.3770233240.

The spelling of 823650397 in words is "eight hundred twenty-three million, six hundred fifty thousand, three hundred ninety-seven".