82400797 has 2 divisors, whose sum is σ = 82400798. Its totient is φ = 82400796.

The previous prime is 82400783. The next prime is 82400809. The reversal of 82400797 is 79700428.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47045881 + 35354916 = 6859^2 + 5946^2 .

It is a cyclic number.

It is not a de Polignac number, because 82400797 - 2¹¹ = 82398749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82400767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41200398 + 41200399.

It is an arithmetic number, because the mean of its divisors is an integer number (41200399).

Almost surely, 2^82400797 is an apocalyptic number.

It is an amenable number.

82400797 is a deficient number, since it is larger than the sum of its proper divisors (1).

82400797 is an equidigital number, since it uses as much as digits as its factorization.

82400797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 82400797 is about 9077.4884742422. The cubic root of 82400797 is about 435.1548257614.

The spelling of 82400797 in words is "eighty-two million, four hundred thousand, seven hundred ninety-seven".