1213689341 has 4 divisors (see below), whose sum is σ = 1217518332. Its totient is φ = 1209860352.

The previous prime is 1213689307. The next prime is 1213689371. The reversal of 1213689341 is 1439863121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1439863121 = 2531 ⋅568891.

It can be written as a sum of positive squares in 2 ways, for example, as 41654116 + 1172035225 = 6454^2 + 34235^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213689341 - 2¹⁸ = 1213427197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1213689295 and 1213689304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213689371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1914020 + ... + 1914653.

It is an arithmetic number, because the mean of its divisors is an integer number (304379583).

Almost surely, 2^1213689341 is an apocalyptic number.

It is an amenable number.

1213689341 is a deficient number, since it is larger than the sum of its proper divisors (3828991).

1213689341 is an equidigital number, since it uses as much as digits as its factorization.

1213689341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3828990.

The product of its digits is 31104, while the sum is 38.

The square root of 1213689341 is about 34838.0444485623. The cubic root of 1213689341 is about 1066.6841599453.

The spelling of 1213689341 in words is "one billion, two hundred thirteen million, six hundred eighty-nine thousand, three hundred forty-one".