492161591 has 2 divisors, whose sum is σ = 492161592. Its totient is φ = 492161590.

The previous prime is 492161557. The next prime is 492161597. The reversal of 492161591 is 195161294.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 492161591 - 2¹⁰ = 492160567 is a prime.

It is a Sophie Germain prime.

It is equal to p_25964282 and since 492161591 and 25964282 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (492161597) 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, 246080795 + 246080796.

It is an arithmetic number, because the mean of its divisors is an integer number (246080796).

Almost surely, 2^492161591 is an apocalyptic number.

492161591 is a deficient number, since it is larger than the sum of its proper divisors (1).

492161591 is an equidigital number, since it uses as much as digits as its factorization.

492161591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 38.

The square root of 492161591 is about 22184.7152562299. The cubic root of 492161591 is about 789.5310954482.

The spelling of 492161591 in words is "four hundred ninety-two million, one hundred sixty-one thousand, five hundred ninety-one".