340940447 has 2 divisors, whose sum is σ = 340940448. Its totient is φ = 340940446.

The previous prime is 340940437. The next prime is 340940473. The reversal of 340940447 is 744049043.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (744049043) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340940447 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340940437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170470223 + 170470224.

It is an arithmetic number, because the mean of its divisors is an integer number (170470224).

Almost surely, 2^340940447 is an apocalyptic number.

340940447 is a deficient number, since it is larger than the sum of its proper divisors (1).

340940447 is an equidigital number, since it uses as much as digits as its factorization.

340940447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 35.

The square root of 340940447 is about 18464.5727543315. The cubic root of 340940447 is about 698.5961299179.

The spelling of 340940447 in words is "three hundred forty million, nine hundred forty thousand, four hundred forty-seven".