81050933 has 2 divisors, whose sum is σ = 81050934. Its totient is φ = 81050932.

The previous prime is 81050899. The next prime is 81050947. The reversal of 81050933 is 33905018.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70174129 + 10876804 = 8377^2 + 3298^2 .

It is a cyclic number.

It is not a de Polignac number, because 81050933 - 2⁶ = 81050869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81050896 and 81050905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81050993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40525466 + 40525467.

It is an arithmetic number, because the mean of its divisors is an integer number (40525467).

Almost surely, 2^81050933 is an apocalyptic number.

It is an amenable number.

81050933 is a deficient number, since it is larger than the sum of its proper divisors (1).

81050933 is an equidigital number, since it uses as much as digits as its factorization.

81050933 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 81050933 is about 9002.8291664343. The cubic root of 81050933 is about 432.7655410995.

The spelling of 81050933 in words is "eighty-one million, fifty thousand, nine hundred thirty-three".