826842981 has 4 divisors (see below), whose sum is σ = 1102457312. Its totient is φ = 551228652.

The previous prime is 826842979. The next prime is 826843009. The reversal of 826842981 is 189248628.

826842981 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 not a de Polignac number, because 826842981 - 2¹ = 826842979 is a prime.

It is a super-2 number, since 2×826842981² = 1367338630457932722, 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 826842981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (826842911) 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, 137807161 + ... + 137807166.

It is an arithmetic number, because the mean of its divisors is an integer number (275614328).

Almost surely, 2^826842981 is an apocalyptic number.

It is an amenable number.

826842981 is a deficient number, since it is larger than the sum of its proper divisors (275614331).

826842981 is a wasteful number, since it uses less digits than its factorization.

826842981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275614330.

The product of its digits is 442368, while the sum is 48.

The square root of 826842981 is about 28754.8775166927. The cubic root of 826842981 is about 938.5865966062.

The spelling of 826842981 in words is "eight hundred twenty-six million, eight hundred forty-two thousand, nine hundred eighty-one".