842444797 has 4 divisors (see below), whose sum is σ = 843401916. Its totient is φ = 841487680.

The previous prime is 842444783. The next prime is 842444833. The reversal of 842444797 is 797444248.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 371294361 + 471150436 = 19269^2 + 21706^2 .

It is a cyclic number.

It is not a de Polignac number, because 842444797 - 2²³ = 834056189 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 842444797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842444767) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 477238 + ... + 478999.

It is an arithmetic number, because the mean of its divisors is an integer number (210850479).

Almost surely, 2^842444797 is an apocalyptic number.

It is an amenable number.

842444797 is a deficient number, since it is larger than the sum of its proper divisors (957119).

842444797 is an equidigital number, since it uses as much as digits as its factorization.

842444797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957118.

The product of its digits is 1806336, while the sum is 49.

The square root of 842444797 is about 29024.8996036162. The cubic root of 842444797 is about 944.4532907094.

The spelling of 842444797 in words is "eight hundred forty-two million, four hundred forty-four thousand, seven hundred ninety-seven".