81062047 has 24 divisors (see below), whose sum is σ = 94332240. Its totient is φ = 68987520.

The previous prime is 81062041. The next prime is 81062057. The reversal of 81062047 is 74026018.

It is not a de Polignac number, because 81062047 - 2³ = 81062039 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 (81062041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1110403 + ... + 1110475.

It is an arithmetic number, because the mean of its divisors is an integer number (3930510).

Almost surely, 2^81062047 is an apocalyptic number.

81062047 is a deficient number, since it is larger than the sum of its proper divisors (13270193).

81062047 is a wasteful number, since it uses less digits than its factorization.

81062047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231 (or 172 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 81062047 is about 9003.4463956865. The cubic root of 81062047 is about 432.7853209927.

It can be divided in two parts, 8106 and 2047, that added together give a triangular number (10153 = T₁₄₂).

The spelling of 81062047 in words is "eighty-one million, sixty-two thousand, forty-seven".