842960981 has 4 divisors (see below), whose sum is σ = 843028032. Its totient is φ = 842893932.

The previous prime is 842960957. The next prime is 842961001. The reversal of 842960981 is 189069248.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 842960981 - 2⁶ = 842960917 is a prime.

It is a super-2 number, since 2×842960981² = 1421166430976964722, which contains 22 as substring.

It is a deceptive number, since it divides R_842960980.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (842960581) 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, 8381 + ... + 41906.

It is an arithmetic number, because the mean of its divisors is an integer number (210757008).

It is a Poulet number, since it divides 2^842960980-1.

Almost surely, 2^842960981 is an apocalyptic number.

842960981 is the 16763-rd octagonal number.

It is an amenable number.

842960981 is a deficient number, since it is larger than the sum of its proper divisors (67051).

842960981 is a wasteful number, since it uses less digits than its factorization.

842960981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67050.

The product of its (nonzero) digits is 248832, while the sum is 47.

The square root of 842960981 is about 29033.7903312675. The cubic root of 842960981 is about 944.6461469232.

The spelling of 842960981 in words is "eight hundred forty-two million, nine hundred sixty thousand, nine hundred eighty-one".