492859921 has 2 divisors, whose sum is σ = 492859922. Its totient is φ = 492859920.

The previous prime is 492859909. The next prime is 492859957. The reversal of 492859921 is 129958294.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 471107025 + 21752896 = 21705^2 + 4664^2 .

It is a cyclic number.

It is not a de Polignac number, because 492859921 - 2¹⁹ = 492335633 is a prime.

It is not a weakly prime, because it can be changed into another prime (492851921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 246429960 + 246429961.

It is an arithmetic number, because the mean of its divisors is an integer number (246429961).

Almost surely, 2^492859921 is an apocalyptic number.

It is an amenable number.

492859921 is a deficient number, since it is larger than the sum of its proper divisors (1).

492859921 is an equidigital number, since it uses as much as digits as its factorization.

492859921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 49.

The square root of 492859921 is about 22200.4486666373. The cubic root of 492859921 is about 789.9043418866.

The spelling of 492859921 in words is "four hundred ninety-two million, eight hundred fifty-nine thousand, nine hundred twenty-one".