842144847 has 16 divisors (see below), whose sum is σ = 1182576000. Its totient is φ = 531602784.

The previous prime is 842144843. The next prime is 842144867. The reversal of 842144847 is 748441248.

It is not a de Polignac number, because 842144847 - 2² = 842144843 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 842144799 and 842144808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842144843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195604 + ... + 199862.

It is an arithmetic number, because the mean of its divisors is an integer number (73911000).

Almost surely, 2^842144847 is an apocalyptic number.

842144847 is a deficient number, since it is larger than the sum of its proper divisors (340431153).

842144847 is a wasteful number, since it uses less digits than its factorization.

842144847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7750.

The product of its digits is 229376, while the sum is 42.

The square root of 842144847 is about 29019.7320283975. The cubic root of 842144847 is about 944.3411874620.

The spelling of 842144847 in words is "eight hundred forty-two million, one hundred forty-four thousand, eight hundred forty-seven".