1209471563 has 4 divisors (see below), whose sum is σ = 1221940440. Its totient is φ = 1197002688.

The previous prime is 1209471551. The next prime is 1209471617. The reversal of 1209471563 is 3651749021.

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 1209471563 - 2¹⁰ = 1209470539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1209479563) 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, 6234293 + ... + 6234486.

It is an arithmetic number, because the mean of its divisors is an integer number (305485110).

Almost surely, 2^1209471563 is an apocalyptic number.

1209471563 is a deficient number, since it is larger than the sum of its proper divisors (12468877).

1209471563 is an equidigital number, since it uses as much as digits as its factorization.

1209471563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12468876.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 1209471563 is about 34777.4576845404. The cubic root of 1209471563 is about 1065.4470892066.

The spelling of 1209471563 in words is "one billion, two hundred nine million, four hundred seventy-one thousand, five hundred sixty-three".