1340806567 has 2 divisors, whose sum is σ = 1340806568. Its totient is φ = 1340806566.

The previous prime is 1340806547. The next prime is 1340806601. The reversal of 1340806567 is 7656080431.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1340806567 is a prime.

It is a super-2 number, since 2×1340806567² = 3595524500220650978, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1340806547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670403283 + 670403284.

It is an arithmetic number, because the mean of its divisors is an integer number (670403284).

Almost surely, 2^1340806567 is an apocalyptic number.

1340806567 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340806567 is an equidigital number, since it uses as much as digits as its factorization.

1340806567 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 1340806567 is about 36617.0256438177. The cubic root of 1340806567 is about 1102.6949258304.

Adding to 1340806567 its reverse (7656080431), we get a palindrome (8996886998).

The spelling of 1340806567 in words is "one billion, three hundred forty million, eight hundred six thousand, five hundred sixty-seven".