81734011 has 12 divisors (see below), whose sum is σ = 89441496. Its totient is φ = 74429760.

The previous prime is 81733969. The next prime is 81734017. The reversal of 81734011 is 11043718.

It is not a de Polignac number, because 81734011 - 2¹¹ = 81731963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81734017) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 13836 + ... + 18838.

It is an arithmetic number, because the mean of its divisors is an integer number (7453458).

Almost surely, 2^81734011 is an apocalyptic number.

81734011 is a deficient number, since it is larger than the sum of its proper divisors (7707485).

81734011 is a wasteful number, since it uses less digits than its factorization.

81734011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5082 (or 5051 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 81734011 is about 9040.6864230544. The cubic root of 81734011 is about 433.9778900301.

Adding to 81734011 its reverse (11043718), we get a palindrome (92777729).

The spelling of 81734011 in words is "eighty-one million, seven hundred thirty-four thousand, eleven".