81826301 has 2 divisors, whose sum is σ = 81826302. Its totient is φ = 81826300.

The previous prime is 81826289. The next prime is 81826319. The reversal of 81826301 is 10362818.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49632025 + 32194276 = 7045^2 + 5674^2 .

It is a cyclic number.

It is not a de Polignac number, because 81826301 - 2⁶ = 81826237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81826361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40913150 + 40913151.

It is an arithmetic number, because the mean of its divisors is an integer number (40913151).

Almost surely, 2^81826301 is an apocalyptic number.

It is an amenable number.

81826301 is a deficient number, since it is larger than the sum of its proper divisors (1).

81826301 is an equidigital number, since it uses as much as digits as its factorization.

81826301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 81826301 is about 9045.7891308608. The cubic root of 81826301 is about 434.1411707076.

The spelling of 81826301 in words is "eighty-one million, eight hundred twenty-six thousand, three hundred one".