806939643 has 8 divisors (see below), whose sum is σ = 1082139408. Its totient is φ = 534849824.

The previous prime is 806939563. The next prime is 806939687. The reversal of 806939643 is 346939608.

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 806939643 - 2¹⁰ = 806938619 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 806939592 and 806939601.

It is not an unprimeable number, because it can be changed into a prime (806939143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 776880 + ... + 777917.

It is an arithmetic number, because the mean of its divisors is an integer number (135267426).

Almost surely, 2^806939643 is an apocalyptic number.

806939643 is a deficient number, since it is larger than the sum of its proper divisors (275199765).

806939643 is a wasteful number, since it uses less digits than its factorization.

806939643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1554973.

The product of its (nonzero) digits is 839808, while the sum is 48.

The square root of 806939643 is about 28406.6830693061. The cubic root of 806939643 is about 930.9942898173.

The spelling of 806939643 in words is "eight hundred six million, nine hundred thirty-nine thousand, six hundred forty-three".