81476089 has 4 divisors (see below), whose sum is σ = 81651024. Its totient is φ = 81301156.

The previous prime is 81476077. The next prime is 81476093. The reversal of 81476089 is 98067418.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 81476089 - 2¹⁵ = 81443321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81476789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86767 + ... + 87700.

It is an arithmetic number, because the mean of its divisors is an integer number (20412756).

Almost surely, 2^81476089 is an apocalyptic number.

It is an amenable number.

81476089 is a deficient number, since it is larger than the sum of its proper divisors (174935).

81476089 is a wasteful number, since it uses less digits than its factorization.

81476089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174934.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 81476089 is about 9026.4106376787. The cubic root of 81476089 is about 433.5209183247.

The spelling of 81476089 in words is "eighty-one million, four hundred seventy-six thousand, eighty-nine".