492890861 has 2 divisors, whose sum is σ = 492890862. Its totient is φ = 492890860.

The previous prime is 492890857. The next prime is 492890863. The reversal of 492890861 is 168098294.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 379041961 + 113848900 = 19469^2 + 10670^2 .

It is a cyclic number.

It is not a de Polignac number, because 492890861 - 2² = 492890857 is a prime.

It is a super-3 number, since 3×492890861³ (a number of 27 digits) contains 333 as substring.

Together with 492890863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (492890863) 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, 246445430 + 246445431.

It is an arithmetic number, because the mean of its divisors is an integer number (246445431).

Almost surely, 2^492890861 is an apocalyptic number.

It is an amenable number.

492890861 is a deficient number, since it is larger than the sum of its proper divisors (1).

492890861 is an equidigital number, since it uses as much as digits as its factorization.

492890861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 248832, while the sum is 47.

The square root of 492890861 is about 22201.1454884652. The cubic root of 492890861 is about 789.9208706729.

The spelling of 492890861 in words is "four hundred ninety-two million, eight hundred ninety thousand, eight hundred sixty-one".