826496981 has 2 divisors, whose sum is σ = 826496982. Its totient is φ = 826496980.

The previous prime is 826496911. The next prime is 826497031. The reversal of 826496981 is 189694628.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 794676100 + 31820881 = 28190^2 + 5641^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-826496981 is a prime.

It is a super-2 number, since 2×826496981² = 1366194519204228722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (826496911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 413248490 + 413248491.

It is an arithmetic number, because the mean of its divisors is an integer number (413248491).

Almost surely, 2^826496981 is an apocalyptic number.

It is an amenable number.

826496981 is a deficient number, since it is larger than the sum of its proper divisors (1).

826496981 is an equidigital number, since it uses as much as digits as its factorization.

826496981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1492992, while the sum is 53.

The square root of 826496981 is about 28748.8605165492. The cubic root of 826496981 is about 938.4556582948.

The spelling of 826496981 in words is "eight hundred twenty-six million, four hundred ninety-six thousand, nine hundred eighty-one".