81087935 has 8 divisors (see below), whose sum is σ = 97508256. Its totient is φ = 64735200.

The previous prime is 81087913. The next prime is 81087947. The reversal of 81087935 is 53978018.

It is a happy number.

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

It is not a de Polignac number, because 81087935 - 2²⁰ = 80039359 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81087892 and 81087901.

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 7 ways as a sum of consecutive naturals, for example, 14216 + ... + 19085.

It is an arithmetic number, because the mean of its divisors is an integer number (12188532).

Almost surely, 2^81087935 is an apocalyptic number.

81087935 is a deficient number, since it is larger than the sum of its proper divisors (16420321).

81087935 is a wasteful number, since it uses less digits than its factorization.

81087935 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33793.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 81087935 is about 9004.8839526115. The cubic root of 81087935 is about 432.8313875730.

The spelling of 81087935 in words is "eighty-one million, eighty-seven thousand, nine hundred thirty-five".