81067277 has 4 divisors (see below), whose sum is σ = 81103680. Its totient is φ = 81030876.

The previous prime is 81067247. The next prime is 81067279. The reversal of 81067277 is 77276018.

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 81067277 - 2⁶ = 81067213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 81067277.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81067279) 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, 14627 + ... + 19392.

It is an arithmetic number, because the mean of its divisors is an integer number (20275920).

Almost surely, 2^81067277 is an apocalyptic number.

It is an amenable number.

81067277 is a deficient number, since it is larger than the sum of its proper divisors (36403).

81067277 is a wasteful number, since it uses less digits than its factorization.

81067277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36402.

The product of its (nonzero) digits is 32928, while the sum is 38.

The square root of 81067277 is about 9003.7368353368. The cubic root of 81067277 is about 432.7946283428.

The spelling of 81067277 in words is "eighty-one million, sixty-seven thousand, two hundred seventy-seven".