490000057 has 2 divisors, whose sum is σ = 490000058. Its totient is φ = 490000056.

The previous prime is 490000031. The next prime is 490000081. The reversal of 490000057 is 750000094.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 281601961 + 208398096 = 16781^2 + 14436^2 .

It is a cyclic number.

It is not a de Polignac number, because 490000057 - 2⁷ = 489999929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 489999986 and 490000040.

It is not a weakly prime, because it can be changed into another prime (490000087) 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, 245000028 + 245000029.

It is an arithmetic number, because the mean of its divisors is an integer number (245000029).

Almost surely, 2^490000057 is an apocalyptic number.

It is an amenable number.

490000057 is a deficient number, since it is larger than the sum of its proper divisors (1).

490000057 is an equidigital number, since it uses as much as digits as its factorization.

490000057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 490000057 is about 22135.9449086774. The cubic root of 490000057 is about 788.3735468801.

The spelling of 490000057 in words is "four hundred ninety million, fifty-seven", and thus it is an aban number.