1213834669 has 4 divisors (see below), whose sum is σ = 1233733660. Its totient is φ = 1193935680.

The previous prime is 1213834649. The next prime is 1213834717. The reversal of 1213834669 is 9664383121.

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

It can be written as a sum of positive squares in 2 ways, for example, as 430562500 + 783272169 = 20750^2 + 27987^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213834669 - 2¹⁷ = 1213703597 is a prime.

It is a super-2 number, since 2×1213834669² = 2946789207332679122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213834649) 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, 9949404 + ... + 9949525.

It is an arithmetic number, because the mean of its divisors is an integer number (308433415).

Almost surely, 2^1213834669 is an apocalyptic number.

It is an amenable number.

1213834669 is a deficient number, since it is larger than the sum of its proper divisors (19898991).

1213834669 is an equidigital number, since it uses as much as digits as its factorization.

1213834669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19898990.

The product of its digits is 186624, while the sum is 43.

The square root of 1213834669 is about 34840.1301518809. The cubic root of 1213834669 is about 1066.7267334121.

The spelling of 1213834669 in words is "one billion, two hundred thirteen million, eight hundred thirty-four thousand, six hundred sixty-nine".