81088079 has 4 divisors (see below), whose sum is σ = 85857984. Its totient is φ = 76318176.

The previous prime is 81088061. The next prime is 81088109. The reversal of 81088079 is 97088018.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81088079 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 (81088279) 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, 2384927 + ... + 2384960.

It is an arithmetic number, because the mean of its divisors is an integer number (21464496).

Almost surely, 2^81088079 is an apocalyptic number.

81088079 is a deficient number, since it is larger than the sum of its proper divisors (4769905).

81088079 is a wasteful number, since it uses less digits than its factorization.

81088079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4769904.

The product of its (nonzero) digits is 32256, while the sum is 41.

The square root of 81088079 is about 9004.8919482690. The cubic root of 81088079 is about 432.8316437874.

The spelling of 81088079 in words is "eighty-one million, eighty-eight thousand, seventy-nine".