340356999 has 4 divisors (see below), whose sum is σ = 453809336. Its totient is φ = 226904664.

The previous prime is 340356953. The next prime is 340357001. The reversal of 340356999 is 999653043.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 999653043 = 3 ⋅333217681.

It is not a de Polignac number, because 340356999 - 2⁷ = 340356871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340356199) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56726164 + ... + 56726169.

It is an arithmetic number, because the mean of its divisors is an integer number (113452334).

Almost surely, 2^340356999 is an apocalyptic number.

340356999 is a deficient number, since it is larger than the sum of its proper divisors (113452337).

340356999 is a wasteful number, since it uses less digits than its factorization.

340356999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113452336.

The product of its (nonzero) digits is 787320, while the sum is 48.

The square root of 340356999 is about 18448.7668693601. The cubic root of 340356999 is about 698.1974021793.

The spelling of 340356999 in words is "three hundred forty million, three hundred fifty-six thousand, nine hundred ninety-nine".