81058735 has 4 divisors (see below), whose sum is σ = 97270488. Its totient is φ = 64846984.

The previous prime is 81058727. The next prime is 81058751. The reversal of 81058735 is 53785018.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 81058735 - 2³ = 81058727 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81058694 and 81058703.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8105869 + ... + 8105878.

It is an arithmetic number, because the mean of its divisors is an integer number (24317622).

Almost surely, 2^81058735 is an apocalyptic number.

81058735 is a deficient number, since it is larger than the sum of its proper divisors (16211753).

81058735 is a wasteful number, since it uses less digits than its factorization.

81058735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16211752.

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 81058735 is about 9003.2624642404. The cubic root of 81058735 is about 432.7794267238.

The spelling of 81058735 in words is "eighty-one million, fifty-eight thousand, seven hundred thirty-five".