1630243 has 2 divisors, whose sum is σ = 1630244. Its totient is φ = 1630242.

The previous prime is 1630199. The next prime is 1630247. The reversal of 1630243 is 3420361.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1630243 - 2⁹ = 1629731 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1630243.

It is not a weakly prime, because it can be changed into another prime (1630247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815121 + 815122.

It is an arithmetic number, because the mean of its divisors is an integer number (815122).

2^1630243 is an apocalyptic number.

1630243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1630243 is an equidigital number, since it uses as much as digits as its factorization.

1630243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 1630243 is about 1276.8096960785. The cubic root of 1630243 is about 117.6930401586.

The spelling of 1630243 in words is "one million, six hundred thirty thousand, two hundred forty-three".