7447831213 has 2 divisors, whose sum is σ = 7447831214. Its totient is φ = 7447831212.

The previous prime is 7447831159. The next prime is 7447831219. The reversal of 7447831213 is 3121387447.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6776088489 + 671742724 = 82317^2 + 25918^2 .

It is a cyclic number.

It is not a de Polignac number, because 7447831213 - 2¹³ = 7447823021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7447831219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3723915606 + 3723915607.

It is an arithmetic number, because the mean of its divisors is an integer number (3723915607).

Almost surely, 2^7447831213 is an apocalyptic number.

It is an amenable number.

7447831213 is a deficient number, since it is larger than the sum of its proper divisors (1).

7447831213 is an equidigital number, since it uses as much as digits as its factorization.

7447831213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 40.

The square root of 7447831213 is about 86300.8181479179. The cubic root of 7447831213 is about 1952.8847256094.

The spelling of 7447831213 in words is "seven billion, four hundred forty-seven million, eight hundred thirty-one thousand, two hundred thirteen".