81348147 has 6 divisors (see below), whose sum is σ = 117502892. Its totient is φ = 54232092.

The previous prime is 81348083. The next prime is 81348151. The reversal of 81348147 is 74184318.

It is not a de Polignac number, because 81348147 - 2⁶ = 81348083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81348167) 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, 4519333 + ... + 4519350.

Almost surely, 2^81348147 is an apocalyptic number.

81348147 is a deficient number, since it is larger than the sum of its proper divisors (36154745).

81348147 is a wasteful number, since it uses less digits than its factorization.

81348147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9038689 (or 9038686 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 81348147 is about 9019.3207615651. The cubic root of 81348147 is about 433.2938799715.

The spelling of 81348147 in words is "eighty-one million, three hundred forty-eight thousand, one hundred forty-seven".