81386935 has 16 divisors (see below), whose sum is σ = 115218432. Its totient is φ = 54007200.

The previous prime is 81386891. The next prime is 81386983. The reversal of 81386935 is 53968318.

It is not a de Polignac number, because 81386935 - 2¹¹ = 81384887 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81386891 and 81386900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36421 + ... + 38590.

It is an arithmetic number, because the mean of its divisors is an integer number (7201152).

Almost surely, 2^81386935 is an apocalyptic number.

81386935 is a deficient number, since it is larger than the sum of its proper divisors (33831497).

81386935 is a wasteful number, since it uses less digits than its factorization.

81386935 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75054.

The product of its digits is 155520, while the sum is 43.

The square root of 81386935 is about 9021.4707780938. The cubic root of 81386935 is about 433.3627360062.

The spelling of 81386935 in words is "eighty-one million, three hundred eighty-six thousand, nine hundred thirty-five".