81060547 has 6 divisors (see below), whose sum is σ = 83006132. Its totient is φ = 79117752.

The previous prime is 81060527. The next prime is 81060569. The reversal of 81060547 is 74506018.

It is a de Polignac number, because none of the positive numbers 2^k-81060547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81060527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 58353 + ... + 59725.

Almost surely, 2^81060547 is an apocalyptic number.

81060547 is the 4813-rd centered heptagonal number.

81060547 is a deficient number, since it is larger than the sum of its proper divisors (1945585).

81060547 is an frugal number, since it uses more digits than its factorization.

81060547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2789 (or 1416 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 81060547 is about 9003.3630938666. The cubic root of 81060547 is about 432.7826515067.

The spelling of 81060547 in words is "eighty-one million, sixty thousand, five hundred forty-seven".