1238847213 has 4 divisors (see below), whose sum is σ = 1651796288. Its totient is φ = 825898140.

The previous prime is 1238847193. The next prime is 1238847221. The reversal of 1238847213 is 3127488321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1238847213 - 2⁶ = 1238847149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1238847713) 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, 206474533 + ... + 206474538.

It is an arithmetic number, because the mean of its divisors is an integer number (412949072).

Almost surely, 2^1238847213 is an apocalyptic number.

It is an amenable number.

1238847213 is a deficient number, since it is larger than the sum of its proper divisors (412949075).

1238847213 is an equidigital number, since it uses as much as digits as its factorization.

1238847213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412949074.

The product of its digits is 64512, while the sum is 39.

The square root of 1238847213 is about 35197.2614417656. The cubic root of 1238847213 is about 1074.0040425483.

The spelling of 1238847213 in words is "one billion, two hundred thirty-eight million, eight hundred forty-seven thousand, two hundred thirteen".