492778717 has 2 divisors, whose sum is σ = 492778718. Its totient is φ = 492778716.

The previous prime is 492778687. The next prime is 492778729. The reversal of 492778717 is 717877294.

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., 467164996 + 25613721 = 21614^2 + 5061^2 .

It is a cyclic number.

It is not a de Polignac number, because 492778717 - 2⁷ = 492778589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (492778747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246389358 + 246389359.

It is an arithmetic number, because the mean of its divisors is an integer number (246389359).

Almost surely, 2^492778717 is an apocalyptic number.

It is an amenable number.

492778717 is a deficient number, since it is larger than the sum of its proper divisors (1).

492778717 is an equidigital number, since it uses as much as digits as its factorization.

492778717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1382976, while the sum is 52.

The square root of 492778717 is about 22198.6197093423. The cubic root of 492778717 is about 789.8609577440.

The spelling of 492778717 in words is "four hundred ninety-two million, seven hundred seventy-eight thousand, seven hundred seventeen".