81036007 has 12 divisors (see below), whose sum is σ = 92371080. Its totient is φ = 70862688.

The previous prime is 81035987. The next prime is 81036019. The reversal of 81036007 is 70063018.

It is not a de Polignac number, because 81036007 - 2⁷ = 81035879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81036047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9408 + ... + 15829.

It is an arithmetic number, because the mean of its divisors is an integer number (7697590).

Almost surely, 2^81036007 is an apocalyptic number.

81036007 is a deficient number, since it is larger than the sum of its proper divisors (11335073).

81036007 is a wasteful number, since it uses less digits than its factorization.

81036007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25282 (or 25269 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 81036007 is about 9002.0001666296. Note that the first 3 decimals coincide. The cubic root of 81036007 is about 432.7389740394.

The spelling of 81036007 in words is "eighty-one million, thirty-six thousand, seven".