492781997 has 2 divisors, whose sum is σ = 492781998. Its totient is φ = 492781996.

The previous prime is 492781963. The next prime is 492782011. The reversal of 492781997 is 799187294.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 420004036 + 72777961 = 20494^2 + 8531^2 .

It is a cyclic number.

It is not a de Polignac number, because 492781997 - 2¹⁰ = 492780973 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (492781937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246390998 + 246390999.

It is an arithmetic number, because the mean of its divisors is an integer number (246390999).

Almost surely, 2^492781997 is an apocalyptic number.

It is an amenable number.

492781997 is a deficient number, since it is larger than the sum of its proper divisors (1).

492781997 is an equidigital number, since it uses as much as digits as its factorization.

492781997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2286144, while the sum is 56.

The square root of 492781997 is about 22198.6935876866. The cubic root of 492781997 is about 789.8627102129.

The spelling of 492781997 in words is "four hundred ninety-two million, seven hundred eighty-one thousand, nine hundred ninety-seven".