842903947 has 4 divisors (see below), whose sum is σ = 845201056. Its totient is φ = 840606840.

The previous prime is 842903939. The next prime is 842903989. The reversal of 842903947 is 749309248.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 842903947 - 2³ = 842903939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 842903897 and 842903906.

It is not an unprimeable number, because it can be changed into a prime (842903447) 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, 1148004 + ... + 1148737.

It is an arithmetic number, because the mean of its divisors is an integer number (211300264).

Almost surely, 2^842903947 is an apocalyptic number.

842903947 is a deficient number, since it is larger than the sum of its proper divisors (2297109).

842903947 is a wasteful number, since it uses less digits than its factorization.

842903947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2297108.

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 842903947 is about 29032.8081142696. The cubic root of 842903947 is about 944.6248417997.

The spelling of 842903947 in words is "eight hundred forty-two million, nine hundred three thousand, nine hundred forty-seven".