1365339991 has 2 divisors, whose sum is σ = 1365339992. Its totient is φ = 1365339990.

The previous prime is 1365339979. The next prime is 1365340013. The reversal of 1365339991 is 1999335631.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1365339991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1365339971) 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, 682669995 + 682669996.

It is an arithmetic number, because the mean of its divisors is an integer number (682669996).

Almost surely, 2^1365339991 is an apocalyptic number.

1365339991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1365339991 is an equidigital number, since it uses as much as digits as its factorization.

1365339991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 590490, while the sum is 49.

The square root of 1365339991 is about 36950.5073172210. The cubic root of 1365339991 is about 1109.3798421488.

The spelling of 1365339991 in words is "one billion, three hundred sixty-five million, three hundred thirty-nine thousand, nine hundred ninety-one".