1213456567 has 2 divisors, whose sum is σ = 1213456568. Its totient is φ = 1213456566.

The previous prime is 1213456553. The next prime is 1213456577. The reversal of 1213456567 is 7656543121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213456567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213456547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606728283 + 606728284.

It is an arithmetic number, because the mean of its divisors is an integer number (606728284).

Almost surely, 2^1213456567 is an apocalyptic number.

1213456567 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213456567 is an equidigital number, since it uses as much as digits as its factorization.

1213456567 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200, while the sum is 40.

The square root of 1213456567 is about 34834.7034866094. The cubic root of 1213456567 is about 1066.6159623142.

Adding to 1213456567 its reverse (7656543121), we get a palindrome (8869999688).

The spelling of 1213456567 in words is "one billion, two hundred thirteen million, four hundred fifty-six thousand, five hundred sixty-seven".