81470807 has 16 divisors (see below), whose sum is σ = 94279680. Its totient is φ = 69669600.

The previous prime is 81470791. The next prime is 81470827. The reversal of 81470807 is 70807418.

It is not a de Polignac number, because 81470807 - 2⁴ = 81470791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81470827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12794 + ... + 18072.

It is an arithmetic number, because the mean of its divisors is an integer number (5892480).

Almost surely, 2^81470807 is an apocalyptic number.

81470807 is a deficient number, since it is larger than the sum of its proper divisors (12808873).

81470807 is a wasteful number, since it uses less digits than its factorization.

81470807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5374.

The product of its (nonzero) digits is 12544, while the sum is 35.

The square root of 81470807 is about 9026.1180470898. The cubic root of 81470807 is about 433.5115499034.

The spelling of 81470807 in words is "eighty-one million, four hundred seventy thousand, eight hundred seven".