340651681 has 8 divisors (see below), whose sum is σ = 349017984. Its totient is φ = 332384640.

The previous prime is 340651667. The next prime is 340651699. The reversal of 340651681 is 186156043.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 340651681 - 2¹¹ = 340649633 is a prime.

It is a super-2 number, since 2×340651681² = 232087135536251522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340655681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17845 + ... + 31618.

It is an arithmetic number, because the mean of its divisors is an integer number (43627248).

Almost surely, 2^340651681 is an apocalyptic number.

It is an amenable number.

340651681 is a deficient number, since it is larger than the sum of its proper divisors (8366303).

340651681 is an equidigital number, since it uses as much as digits as its factorization.

340651681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49631.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 340651681 is about 18456.7516372736. The cubic root of 340651681 is about 698.3988444468.

The spelling of 340651681 in words is "three hundred forty million, six hundred fifty-one thousand, six hundred eighty-one".