1213341639 has 4 divisors (see below), whose sum is σ = 1617788856. Its totient is φ = 808894424.

The previous prime is 1213341631. The next prime is 1213341641. The reversal of 1213341639 is 9361433121.

It is a happy number.

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 1213341639 - 2³ = 1213341631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213341631) 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, 202223604 + ... + 202223609.

It is an arithmetic number, because the mean of its divisors is an integer number (404447214).

Almost surely, 2^1213341639 is an apocalyptic number.

1213341639 is a deficient number, since it is larger than the sum of its proper divisors (404447217).

1213341639 is an equidigital number, since it uses as much as digits as its factorization.

1213341639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404447216.

The product of its digits is 11664, while the sum is 33.

The square root of 1213341639 is about 34833.0538282247. The cubic root of 1213341639 is about 1066.5822877373.

The spelling of 1213341639 in words is "one billion, two hundred thirteen million, three hundred forty-one thousand, six hundred thirty-nine".