1243133563 has 8 divisors (see below), whose sum is σ = 1421474528. Its totient is φ = 1064980224.

The previous prime is 1243133543. The next prime is 1243133587. The reversal of 1243133563 is 3653313421.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1243133563 - 2⁹ = 1243133051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1243133543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32406 + ... + 59467.

It is an arithmetic number, because the mean of its divisors is an integer number (177684316).

Almost surely, 2^1243133563 is an apocalyptic number.

1243133563 is a deficient number, since it is larger than the sum of its proper divisors (178340965).

1243133563 is an equidigital number, since it uses as much as digits as its factorization.

1243133563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93813.

The product of its digits is 19440, while the sum is 31.

The square root of 1243133563 is about 35258.0992539303. The cubic root of 1243133563 is about 1075.2412836441.

Adding to 1243133563 its reverse (3653313421), we get a palindrome (4896446984).

The spelling of 1243133563 in words is "one billion, two hundred forty-three million, one hundred thirty-three thousand, five hundred sixty-three".