81032959 has 8 divisors (see below), whose sum is σ = 92927520. Its totient is φ = 69218016.

The previous prime is 81032953. The next prime is 81032981. The reversal of 81032959 is 95923018.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 81032959 - 2³ = 81032951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81032951) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17704 + ... + 21805.

It is an arithmetic number, because the mean of its divisors is an integer number (11615940).

Almost surely, 2^81032959 is an apocalyptic number.

81032959 is a deficient number, since it is larger than the sum of its proper divisors (11894561).

81032959 is a wasteful number, since it uses less digits than its factorization.

81032959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39809.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 81032959 is about 9001.8308693288. The cubic root of 81032959 is about 432.7335484474.

The spelling of 81032959 in words is "eighty-one million, thirty-two thousand, nine hundred fifty-nine".