1630743243 has 4 divisors (see below), whose sum is σ = 2174324328. Its totient is φ = 1087162160.

The previous prime is 1630743221. The next prime is 1630743253. The reversal of 1630743243 is 3423470361.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1630743243 - 2²¹ = 1628646091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1630743253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271790538 + ... + 271790543.

It is an arithmetic number, because the mean of its divisors is an integer number (543581082).

Almost surely, 2^1630743243 is an apocalyptic number.

1630743243 is a deficient number, since it is larger than the sum of its proper divisors (543581085).

1630743243 is an equidigital number, since it uses as much as digits as its factorization.

1630743243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543581084.

The product of its (nonzero) digits is 36288, while the sum is 33.

The square root of 1630743243 is about 40382.4620720431. The cubic root of 1630743243 is about 1177.0507703461.

The spelling of 1630743243 in words is "one billion, six hundred thirty million, seven hundred forty-three thousand, two hundred forty-three".