81073367 has 4 divisors (see below), whose sum is σ = 84598320. Its totient is φ = 77548416.

The previous prime is 81073351. The next prime is 81073373. The reversal of 81073367 is 76337018.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76337018 = 2 ⋅38168509.

It is a cyclic number.

It is not a de Polignac number, because 81073367 - 2⁴ = 81073351 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 (81073337) 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, 1762442 + ... + 1762487.

It is an arithmetic number, because the mean of its divisors is an integer number (21149580).

Almost surely, 2^81073367 is an apocalyptic number.

81073367 is a deficient number, since it is larger than the sum of its proper divisors (3524953).

81073367 is a wasteful number, since it uses less digits than its factorization.

81073367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3524952.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 81073367 is about 9004.0750218998. The cubic root of 81073367 is about 432.8054656513.

The spelling of 81073367 in words is "eighty-one million, seventy-three thousand, three hundred sixty-seven".