340001663 has 4 divisors (see below), whose sum is σ = 354784368. Its totient is φ = 325218960.

The previous prime is 340001647. The next prime is 340001671. The reversal of 340001663 is 366100043.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 340001663 - 2⁴ = 340001647 is a prime.

It is a super-2 number, since 2×340001663² = 231202261685531138, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 14782681 = 340001663 / (3 + 4 + 0 + 0 + 0 + 1 + 6 + 6 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340001603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7391318 + ... + 7391363.

It is an arithmetic number, because the mean of its divisors is an integer number (88696092).

Almost surely, 2^340001663 is an apocalyptic number.

340001663 is a deficient number, since it is larger than the sum of its proper divisors (14782705).

340001663 is a wasteful number, since it uses less digits than its factorization.

340001663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14782704.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 340001663 is about 18439.1340089496. The cubic root of 340001663 is about 697.9543426265.

The spelling of 340001663 in words is "three hundred forty million, one thousand, six hundred sixty-three".