340918289 has 4 divisors (see below), whose sum is σ = 360972324. Its totient is φ = 320864256.

The previous prime is 340918283. The next prime is 340918301. The reversal of 340918289 is 982819043.

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: 982819043 = 1429 ⋅687767.

It can be written as a sum of positive squares in 2 ways, for example, as 259467664 + 81450625 = 16108^2 + 9025^2 .

It is a de Polignac number, because none of the positive numbers 2^k-340918289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340918283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10026992 + ... + 10027025.

It is an arithmetic number, because the mean of its divisors is an integer number (90243081).

Almost surely, 2^340918289 is an apocalyptic number.

It is an amenable number.

340918289 is a deficient number, since it is larger than the sum of its proper divisors (20054035).

340918289 is a wasteful number, since it uses less digits than its factorization.

340918289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20054034.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 340918289 is about 18463.9727306991. The cubic root of 340918289 is about 698.5809954777.

The spelling of 340918289 in words is "three hundred forty million, nine hundred eighteen thousand, two hundred eighty-nine".