81083013 has 32 divisors (see below), whose sum is σ = 131466240. Its totient is φ = 43810560.

The previous prime is 81083003. The next prime is 81083017. The reversal of 81083013 is 31038018.

It is not a de Polignac number, because 81083013 - 2⁹ = 81082501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81083017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6856 + ... + 14462.

It is an arithmetic number, because the mean of its divisors is an integer number (4108320).

Almost surely, 2^81083013 is an apocalyptic number.

It is an amenable number.

81083013 is a deficient number, since it is larger than the sum of its proper divisors (50383227).

81083013 is a wasteful number, since it uses less digits than its factorization.

81083013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7657.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 81083013 is about 9004.6106523270. The cubic root of 81083013 is about 432.8226298411.

The spelling of 81083013 in words is "eighty-one million, eighty-three thousand, thirteen".