81486007 has 4 divisors (see below), whose sum is σ = 81689616. Its totient is φ = 81282400.

The previous prime is 81485959. The next prime is 81486017. The reversal of 81486007 is 70068418.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 81486007 - 2¹¹ = 81483959 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 (81486017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101203 + ... + 102004.

It is an arithmetic number, because the mean of its divisors is an integer number (20422404).

Almost surely, 2^81486007 is an apocalyptic number.

81486007 is a deficient number, since it is larger than the sum of its proper divisors (203609).

81486007 is a wasteful number, since it uses less digits than its factorization.

81486007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203608.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 81486007 is about 9026.9600087737. The cubic root of 81486007 is about 433.5385082952.

The spelling of 81486007 in words is "eighty-one million, four hundred eighty-six thousand, seven".