1211934847 has 2 divisors, whose sum is σ = 1211934848. Its totient is φ = 1211934846.

The previous prime is 1211934769. The next prime is 1211934851. The reversal of 1211934847 is 7484391121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211934847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1211934877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605967423 + 605967424.

It is an arithmetic number, because the mean of its divisors is an integer number (605967424).

Almost surely, 2^1211934847 is an apocalyptic number.

1211934847 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211934847 is an equidigital number, since it uses as much as digits as its factorization.

1211934847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 40.

The square root of 1211934847 is about 34812.8546229694. The cubic root of 1211934847 is about 1066.1699170164.

The spelling of 1211934847 in words is "one billion, two hundred eleven million, nine hundred thirty-four thousand, eight hundred forty-seven".