82426991 has 2 divisors, whose sum is σ = 82426992. Its totient is φ = 82426990.

The previous prime is 82426979. The next prime is 82427003. The reversal of 82426991 is 19962428.

It is a balanced prime because it is at equal distance from previous prime (82426979) and next prime (82427003).

It is a cyclic number.

It is not a de Polignac number, because 82426991 - 2¹⁴ = 82410607 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82426291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41213495 + 41213496.

It is an arithmetic number, because the mean of its divisors is an integer number (41213496).

Almost surely, 2^82426991 is an apocalyptic number.

82426991 is a deficient number, since it is larger than the sum of its proper divisors (1).

82426991 is an equidigital number, since it uses as much as digits as its factorization.

82426991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 41.

The square root of 82426991 is about 9078.9311595584. The cubic root of 82426991 is about 435.2009306469.

The spelling of 82426991 in words is "eighty-two million, four hundred twenty-six thousand, nine hundred ninety-one".