81036807 has 16 divisors (see below), whose sum is σ = 115591392. Its totient is φ = 50319360.

The previous prime is 81036793. The next prime is 81036827. The reversal of 81036807 is 70863018.

It is not a de Polignac number, because 81036807 - 2⁶ = 81036743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81036827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3244 + ... + 13137.

It is an arithmetic number, because the mean of its divisors is an integer number (7224462).

Almost surely, 2^81036807 is an apocalyptic number.

81036807 is a deficient number, since it is larger than the sum of its proper divisors (34554585).

81036807 is a wasteful number, since it uses less digits than its factorization.

81036807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16498.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 81036807 is about 9002.0446010892. The cubic root of 81036807 is about 432.7403980567.

The spelling of 81036807 in words is "eighty-one million, thirty-six thousand, eight hundred seven".