497799817 has 2 divisors, whose sum is σ = 497799818. Its totient is φ = 497799816.

The previous prime is 497799793. The next prime is 497799821. The reversal of 497799817 is 718997794.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 440328256 + 57471561 = 20984^2 + 7581^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-497799817 is a prime.

It is not a weakly prime, because it can be changed into another prime (497799857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 248899908 + 248899909.

It is an arithmetic number, because the mean of its divisors is an integer number (248899909).

Almost surely, 2^497799817 is an apocalyptic number.

It is an amenable number.

497799817 is a deficient number, since it is larger than the sum of its proper divisors (1).

497799817 is an equidigital number, since it uses as much as digits as its factorization.

497799817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8001504, while the sum is 61.

The square root of 497799817 is about 22311.4279462342. The cubic root of 497799817 is about 792.5346232390.

The spelling of 497799817 in words is "four hundred ninety-seven million, seven hundred ninety-nine thousand, eight hundred seventeen".