842147823 has 8 divisors (see below), whose sum is σ = 1224942336. Its totient is φ = 510392600.

The previous prime is 842147753. The next prime is 842147863. The reversal of 842147823 is 328741248.

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 842147823 - 2⁸ = 842147567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842147863) 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, 12759783 + ... + 12759848.

It is an arithmetic number, because the mean of its divisors is an integer number (153117792).

Almost surely, 2^842147823 is an apocalyptic number.

842147823 is a deficient number, since it is larger than the sum of its proper divisors (382794513).

842147823 is a wasteful number, since it uses less digits than its factorization.

842147823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25519645.

The product of its digits is 86016, while the sum is 39.

The square root of 842147823 is about 29019.7833038085. The cubic root of 842147823 is about 944.3422998423.

The spelling of 842147823 in words is "eight hundred forty-two million, one hundred forty-seven thousand, eight hundred twenty-three".