340282391 has 2 divisors, whose sum is σ = 340282392. Its totient is φ = 340282390.

The previous prime is 340282361. The next prime is 340282409. The reversal of 340282391 is 193282043.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340282391 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340282301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170141195 + 170141196.

It is an arithmetic number, because the mean of its divisors is an integer number (170141196).

Almost surely, 2^340282391 is an apocalyptic number.

340282391 is a deficient number, since it is larger than the sum of its proper divisors (1).

340282391 is an equidigital number, since it uses as much as digits as its factorization.

340282391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 340282391 is about 18446.7447263738. The cubic root of 340282391 is about 698.1463823006.

The spelling of 340282391 in words is "three hundred forty million, two hundred eighty-two thousand, three hundred ninety-one".