340333991 has 2 divisors, whose sum is σ = 340333992. Its totient is φ = 340333990.

The previous prime is 340333969. The next prime is 340333997. The reversal of 340333991 is 199333043.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340333991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340333997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170166995 + 170166996.

It is an arithmetic number, because the mean of its divisors is an integer number (170166996).

Almost surely, 2^340333991 is an apocalyptic number.

340333991 is a deficient number, since it is larger than the sum of its proper divisors (1).

340333991 is an equidigital number, since it uses as much as digits as its factorization.

340333991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 35.

The square root of 340333991 is about 18448.1432941096. The cubic root of 340333991 is about 698.1816692010.

The spelling of 340333991 in words is "three hundred forty million, three hundred thirty-three thousand, nine hundred ninety-one".