81032953 has 2 divisors, whose sum is σ = 81032954. Its totient is φ = 81032952.

The previous prime is 81032951. The next prime is 81032981. The reversal of 81032953 is 35923018.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59799289 + 21233664 = 7733^2 + 4608^2 .

It is a cyclic number.

It is not a de Polignac number, because 81032953 - 2¹ = 81032951 is a prime.

Together with 81032951, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (81032951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40516476 + 40516477.

It is an arithmetic number, because the mean of its divisors is an integer number (40516477).

Almost surely, 2^81032953 is an apocalyptic number.

It is an amenable number.

81032953 is a deficient number, since it is larger than the sum of its proper divisors (1).

81032953 is an equidigital number, since it uses as much as digits as its factorization.

81032953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 81032953 is about 9001.8305360632. The cubic root of 81032953 is about 432.7335377670.

The spelling of 81032953 in words is "eighty-one million, thirty-two thousand, nine hundred fifty-three".