842734981 has 4 divisors (see below), whose sum is σ = 919347264. Its totient is φ = 766122700.

The previous prime is 842734961. The next prime is 842734993. The reversal of 842734981 is 189437248.

842734981 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 842734981 - 2⁹ = 842734469 is a prime.

It is a super-2 number, since 2×842734981² = 1420404496402140722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842734961) 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, 38306125 + ... + 38306146.

It is an arithmetic number, because the mean of its divisors is an integer number (229836816).

Almost surely, 2^842734981 is an apocalyptic number.

It is an amenable number.

842734981 is a deficient number, since it is larger than the sum of its proper divisors (76612283).

842734981 is a wasteful number, since it uses less digits than its factorization.

842734981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76612282.

The product of its digits is 387072, while the sum is 46.

The square root of 842734981 is about 29029.8980535585. The cubic root of 842734981 is about 944.5617186931.

The spelling of 842734981 in words is "eight hundred forty-two million, seven hundred thirty-four thousand, nine hundred eighty-one".