1213331947 has 2 divisors, whose sum is σ = 1213331948. Its totient is φ = 1213331946.

The previous prime is 1213331941. The next prime is 1213332013. The reversal of 1213331947 is 7491333121.

It is a weak prime.

It is an emirp because it is prime and its reverse (7491333121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1213331947 - 2¹⁵ = 1213299179 is a prime.

It is a super-2 number, since 2×1213331947² = 2944348827221621618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1213331941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606665973 + 606665974.

It is an arithmetic number, because the mean of its divisors is an integer number (606665974).

Almost surely, 2^1213331947 is an apocalyptic number.

1213331947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213331947 is an equidigital number, since it uses as much as digits as its factorization.

1213331947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 34.

The square root of 1213331947 is about 34832.9147072133. The cubic root of 1213331947 is about 1066.5794478273.

The spelling of 1213331947 in words is "one billion, two hundred thirteen million, three hundred thirty-one thousand, nine hundred forty-seven".