340001681 has 4 divisors (see below), whose sum is σ = 340230000. Its totient is φ = 339773364.

The previous prime is 340001671. The next prime is 340001689. The reversal of 340001681 is 186100043.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 340001681 - 2¹⁸ = 339739537 is a prime.

It is a super-2 number, since 2×340001681² = 231202286165651522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340001689) 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, 111911 + ... + 114908.

It is an arithmetic number, because the mean of its divisors is an integer number (85057500).

Almost surely, 2^340001681 is an apocalyptic number.

It is an amenable number.

340001681 is a deficient number, since it is larger than the sum of its proper divisors (228319).

340001681 is a wasteful number, since it uses less digits than its factorization.

340001681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228318.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 340001681 is about 18439.1344970419. The cubic root of 340001681 is about 697.9543549432.

The spelling of 340001681 in words is "three hundred forty million, one thousand, six hundred eighty-one".