81026059 has 2 divisors, whose sum is σ = 81026060. Its totient is φ = 81026058.

The previous prime is 81026053. The next prime is 81026129. The reversal of 81026059 is 95062018.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81026059 - 2¹⁵ = 80993291 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 81026059.

It is not a weakly prime, because it can be changed into another prime (81026053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40513029 + 40513030.

It is an arithmetic number, because the mean of its divisors is an integer number (40513030).

Almost surely, 2^81026059 is an apocalyptic number.

81026059 is a deficient number, since it is larger than the sum of its proper divisors (1).

81026059 is an equidigital number, since it uses as much as digits as its factorization.

81026059 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 81026059 is about 9001.4476058021. The cubic root of 81026059 is about 432.7212656007.

It can be divided in two parts, 8102 and 6059, that added together give a square (14161 = 119²).

The spelling of 81026059 in words is "eighty-one million, twenty-six thousand, fifty-nine".