81346433 has 4 divisors (see below), whose sum is σ = 92967360. Its totient is φ = 69725508.

The previous prime is 81346403. The next prime is 81346471. The reversal of 81346433 is 33464318.

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 81346433 - 2¹² = 81342337 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 81346433.

It is not an unprimeable number, because it can be changed into a prime (81346403) 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, 5810453 + ... + 5810466.

It is an arithmetic number, because the mean of its divisors is an integer number (23241840).

Almost surely, 2^81346433 is an apocalyptic number.

It is an amenable number.

81346433 is a deficient number, since it is larger than the sum of its proper divisors (11620927).

81346433 is a wasteful number, since it uses less digits than its factorization.

81346433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11620926.

The product of its digits is 20736, while the sum is 32.

The square root of 81346433 is about 9019.2257428229. The cubic root of 81346433 is about 433.2908367924.

The spelling of 81346433 in words is "eighty-one million, three hundred forty-six thousand, four hundred thirty-three".