81030359 has 2 divisors, whose sum is σ = 81030360. Its totient is φ = 81030358.

The previous prime is 81030353. The next prime is 81030371. The reversal of 81030359 is 95303018.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81030359 - 2⁴ = 81030343 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 (81030353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40515179 + 40515180.

It is an arithmetic number, because the mean of its divisors is an integer number (40515180).

Almost surely, 2^81030359 is an apocalyptic number.

81030359 is a deficient number, since it is larger than the sum of its proper divisors (1).

81030359 is an equidigital number, since it uses as much as digits as its factorization.

81030359 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 81030359 is about 9001.6864531042. The cubic root of 81030359 is about 432.7289202102.

The spelling of 81030359 in words is "eighty-one million, thirty thousand, three hundred fifty-nine".