842444247 has 8 divisors (see below), whose sum is σ = 1127435760. Its totient is φ = 559541120.

The previous prime is 842444233. The next prime is 842444293. The reversal of 842444247 is 742444248.

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 842444247 - 2⁸ = 842443991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842444947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 521154 + ... + 522767.

It is an arithmetic number, because the mean of its divisors is an integer number (140929470).

Almost surely, 2^842444247 is an apocalyptic number.

842444247 is a deficient number, since it is larger than the sum of its proper divisors (284991513).

842444247 is a wasteful number, since it uses less digits than its factorization.

842444247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044193.

The product of its digits is 229376, while the sum is 39.

The square root of 842444247 is about 29024.8901289910. The cubic root of 842444247 is about 944.4530851769.

Subtracting from 842444247 its reverse (742444248), we obtain a palindrome (99999999).

The spelling of 842444247 in words is "eight hundred forty-two million, four hundred forty-four thousand, two hundred forty-seven".