1206611647 has 2 divisors, whose sum is σ = 1206611648. Its totient is φ = 1206611646.

The previous prime is 1206611603. The next prime is 1206611657. The reversal of 1206611647 is 7461166021.

It is a strong prime.

It is an emirp because it is prime and its reverse (7461166021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1206611647 - 2²⁷ = 1072393919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1206611657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 603305823 + 603305824.

It is an arithmetic number, because the mean of its divisors is an integer number (603305824).

Almost surely, 2^1206611647 is an apocalyptic number.

1206611647 is a deficient number, since it is larger than the sum of its proper divisors (1).

1206611647 is an equidigital number, since it uses as much as digits as its factorization.

1206611647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 1206611647 is about 34736.3159675864. The cubic root of 1206611647 is about 1064.6066411558.

Adding to 1206611647 its reverse (7461166021), we get a palindrome (8667777668).

The spelling of 1206611647 in words is "one billion, two hundred six million, six hundred eleven thousand, six hundred forty-seven".