81092006 has 16 divisors (see below), whose sum is σ = 129224160. Its totient is φ = 38033280.

The previous prime is 81091993. The next prime is 81092009. The reversal of 81092006 is 60029018.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81092009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6740 + ... + 14408.

It is an arithmetic number, because the mean of its divisors is an integer number (8076510).

Almost surely, 2^81092006 is an apocalyptic number.

81092006 is a deficient number, since it is larger than the sum of its proper divisors (48132154).

81092006 is a wasteful number, since it uses less digits than its factorization.

81092006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7999.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 81092006 is about 9005.1099937758. The cubic root of 81092006 is about 432.8386308499.

The spelling of 81092006 in words is "eighty-one million, ninety-two thousand, six".