492687161 has 2 divisors, whose sum is σ = 492687162. Its totient is φ = 492687160.

The previous prime is 492687137. The next prime is 492687187. The reversal of 492687161 is 161786294.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 405619600 + 87067561 = 20140^2 + 9331^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-492687161 is a prime.

It is a super-2 number, since 2×492687161² = 485481277228479842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (492687101) 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, 246343580 + 246343581.

It is an arithmetic number, because the mean of its divisors is an integer number (246343581).

Almost surely, 2^492687161 is an apocalyptic number.

It is an amenable number.

492687161 is a deficient number, since it is larger than the sum of its proper divisors (1).

492687161 is an equidigital number, since it uses as much as digits as its factorization.

492687161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 44.

The square root of 492687161 is about 22196.5574132567. The cubic root of 492687161 is about 789.8120372133.

The spelling of 492687161 in words is "four hundred ninety-two million, six hundred eighty-seven thousand, one hundred sixty-one".