826542407 has 2 divisors, whose sum is σ = 826542408. Its totient is φ = 826542406.

The previous prime is 826542391. The next prime is 826542413. The reversal of 826542407 is 704245628.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 826542407 - 2⁴ = 826542391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (826542107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 413271203 + 413271204.

It is an arithmetic number, because the mean of its divisors is an integer number (413271204).

Almost surely, 2^826542407 is an apocalyptic number.

826542407 is a deficient number, since it is larger than the sum of its proper divisors (1).

826542407 is an equidigital number, since it uses as much as digits as its factorization.

826542407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 107520, while the sum is 38.

The square root of 826542407 is about 28749.6505543980. The cubic root of 826542407 is about 938.4728511407.

The spelling of 826542407 in words is "eight hundred twenty-six million, five hundred forty-two thousand, four hundred seven".