8563942 has 4 divisors (see below), whose sum is σ = 12845916. Its totient is φ = 4281970.

The previous prime is 8563939. The next prime is 8563969. The reversal of 8563942 is 2493658.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2493658 = 2 ⋅1246829.

It is a super-2 number, since 2×8563942² = 146682205158728, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2140984 + ... + 2140987.

It is an arithmetic number, because the mean of its divisors is an integer number (3211479).

Almost surely, 2^8563942 is an apocalyptic number.

8563942 is a deficient number, since it is larger than the sum of its proper divisors (4281974).

8563942 is a wasteful number, since it uses less digits than its factorization.

8563942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4281973.

The product of its digits is 51840, while the sum is 37.

The square root of 8563942 is about 2926.4213640554. The cubic root of 8563942 is about 204.5932207309.

The spelling of 8563942 in words is "eight million, five hundred sixty-three thousand, nine hundred forty-two".