1320846647 has 2 divisors, whose sum is σ = 1320846648. Its totient is φ = 1320846646.

The previous prime is 1320846641. The next prime is 1320846677. The reversal of 1320846647 is 7466480231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1320846647 - 2⁸ = 1320846391 is a prime.

It is a super-2 number, since 2×1320846647² = 3489271729782285218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320846641) 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, 660423323 + 660423324.

It is an arithmetic number, because the mean of its divisors is an integer number (660423324).

Almost surely, 2^1320846647 is an apocalyptic number.

1320846647 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320846647 is an equidigital number, since it uses as much as digits as its factorization.

1320846647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 41.

The square root of 1320846647 is about 36343.4539772983. The cubic root of 1320846647 is about 1097.1957904131.

The spelling of 1320846647 in words is "one billion, three hundred twenty million, eight hundred forty-six thousand, six hundred forty-seven".