842385487 has 4 divisors (see below), whose sum is σ = 844608520. Its totient is φ = 840162456.

The previous prime is 842385473. The next prime is 842385493. The reversal of 842385487 is 784583248.

842385487 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-842385487 is a prime.

It is a super-2 number, since 2×842385487² = 1419226617416454338, which contains 22 as substring.

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 842385487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842385457) 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, 1110948 + ... + 1111705.

It is an arithmetic number, because the mean of its divisors is an integer number (211152130).

Almost surely, 2^842385487 is an apocalyptic number.

842385487 is a deficient number, since it is larger than the sum of its proper divisors (2223033).

842385487 is a wasteful number, since it uses less digits than its factorization.

842385487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2223032.

The product of its digits is 1720320, while the sum is 49.

The square root of 842385487 is about 29023.8778766725. The cubic root of 842385487 is about 944.4311263138.

The spelling of 842385487 in words is "eight hundred forty-two million, three hundred eighty-five thousand, four hundred eighty-seven".