340234681 has 2 divisors, whose sum is σ = 340234682. Its totient is φ = 340234680.

The previous prime is 340234673. The next prime is 340234693. The reversal of 340234681 is 186432043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 275029056 + 65205625 = 16584^2 + 8075^2 .

It is a cyclic number.

It is not a de Polignac number, because 340234681 - 2³ = 340234673 is a prime.

It is a super-2 number, since 2×340234681² = 231519276310343522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (340234621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170117340 + 170117341.

It is an arithmetic number, because the mean of its divisors is an integer number (170117341).

Almost surely, 2^340234681 is an apocalyptic number.

It is an amenable number.

340234681 is a deficient number, since it is larger than the sum of its proper divisors (1).

340234681 is an equidigital number, since it uses as much as digits as its factorization.

340234681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 340234681 is about 18445.4514989468. The cubic root of 340234681 is about 698.1137524206.

It can be divided in two parts, 3402 and 34681, that added together give a palindrome (38083).

The spelling of 340234681 in words is "three hundred forty million, two hundred thirty-four thousand, six hundred eighty-one".