490000243 has 2 divisors, whose sum is σ = 490000244. Its totient is φ = 490000242.

The previous prime is 490000223. The next prime is 490000261. The reversal of 490000243 is 342000094.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 490000243 - 2¹³ = 489992051 is a prime.

It is not a weakly prime, because it can be changed into another prime (490000223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245000121 + 245000122.

It is an arithmetic number, because the mean of its divisors is an integer number (245000122).

Almost surely, 2^490000243 is an apocalyptic number.

490000243 is a deficient number, since it is larger than the sum of its proper divisors (1).

490000243 is an equidigital number, since it uses as much as digits as its factorization.

490000243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 490000243 is about 22135.9491099885. The cubic root of 490000243 is about 788.3736466335.

The spelling of 490000243 in words is "four hundred ninety million, two hundred forty-three", and thus it is an aban number.