340342999 has 2 divisors, whose sum is σ = 340343000. Its totient is φ = 340342998.

The previous prime is 340342997. The next prime is 340343021. The reversal of 340342999 is 999243043.

It is a weak prime.

It is an emirp because it is prime and its reverse (999243043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 340342999 - 2¹ = 340342997 is a prime.

Together with 340342997, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340342997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170171499 + 170171500.

It is an arithmetic number, because the mean of its divisors is an integer number (170171500).

Almost surely, 2^340342999 is an apocalyptic number.

340342999 is a deficient number, since it is larger than the sum of its proper divisors (1).

340342999 is an equidigital number, since it uses as much as digits as its factorization.

340342999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 209952, while the sum is 43.

The square root of 340342999 is about 18448.3874363046. The cubic root of 340342999 is about 698.1878289981.

The spelling of 340342999 in words is "three hundred forty million, three hundred forty-two thousand, nine hundred ninety-nine".