340678357 has 2 divisors, whose sum is σ = 340678358. Its totient is φ = 340678356.

The previous prime is 340678343. The next prime is 340678361. The reversal of 340678357 is 753876043.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 290566116 + 50112241 = 17046^2 + 7079^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340678357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340678337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170339178 + 170339179.

It is an arithmetic number, because the mean of its divisors is an integer number (170339179).

Almost surely, 2^340678357 is an apocalyptic number.

It is an amenable number.

340678357 is a deficient number, since it is larger than the sum of its proper divisors (1).

340678357 is an equidigital number, since it uses as much as digits as its factorization.

340678357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 423360, while the sum is 43.

The square root of 340678357 is about 18457.4742855029. The cubic root of 340678357 is about 698.4170742128.

It can be divided in two parts, 34067 and 8357, that added together give a palindrome (42424).

The spelling of 340678357 in words is "three hundred forty million, six hundred seventy-eight thousand, three hundred fifty-seven".