340454399 has 2 divisors, whose sum is σ = 340454400. Its totient is φ = 340454398.

The previous prime is 340454357. The next prime is 340454437. The reversal of 340454399 is 993454043.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340454399 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 (340454339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170227199 + 170227200.

It is an arithmetic number, because the mean of its divisors is an integer number (170227200).

Almost surely, 2^340454399 is an apocalyptic number.

340454399 is a deficient number, since it is larger than the sum of its proper divisors (1).

340454399 is an equidigital number, since it uses as much as digits as its factorization.

340454399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 233280, while the sum is 41.

The square root of 340454399 is about 18451.4064233597. The cubic root of 340454399 is about 698.2639969031.

The spelling of 340454399 in words is "three hundred forty million, four hundred fifty-four thousand, three hundred ninety-nine".