1630543 has 2 divisors, whose sum is σ = 1630544. Its totient is φ = 1630542.

The previous prime is 1630501. The next prime is 1630547. The reversal of 1630543 is 3450361.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1630543 - 2¹⁷ = 1499471 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1630547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815271 + 815272.

It is an arithmetic number, because the mean of its divisors is an integer number (815272).

2^1630543 is an apocalyptic number.

1630543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1630543 is an equidigital number, since it uses as much as digits as its factorization.

1630543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 1630543 is about 1276.9271709851. The cubic root of 1630543 is about 117.7002590715.

The spelling of 1630543 in words is "one million, six hundred thirty thousand, five hundred forty-three".