81233941 has 2 divisors, whose sum is σ = 81233942. Its totient is φ = 81233940.

The previous prime is 81233927. The next prime is 81233969. The reversal of 81233941 is 14933218.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43362225 + 37871716 = 6585^2 + 6154^2 .

It is a cyclic number.

It is not a de Polignac number, because 81233941 - 2⁵ = 81233909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81233921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40616970 + 40616971.

It is an arithmetic number, because the mean of its divisors is an integer number (40616971).

Almost surely, 2^81233941 is an apocalyptic number.

It is an amenable number.

81233941 is a deficient number, since it is larger than the sum of its proper divisors (1).

81233941 is an equidigital number, since it uses as much as digits as its factorization.

81233941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 31.

The square root of 81233941 is about 9012.9873515944. The cubic root of 81233941 is about 433.0910155414.

The spelling of 81233941 in words is "eighty-one million, two hundred thirty-three thousand, nine hundred forty-one".