81470741 has 8 divisors (see below), whose sum is σ = 89758368. Its totient is φ = 73330000.

The previous prime is 81470737. The next prime is 81470747. The reversal of 81470741 is 14707418.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 81470741 - 2² = 81470737 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81470698 and 81470707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81470747) 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 7 ways as a sum of consecutive naturals, for example, 35555 + ... + 37776.

It is an arithmetic number, because the mean of its divisors is an integer number (11219796).

Almost surely, 2^81470741 is an apocalyptic number.

It is an amenable number.

81470741 is a deficient number, since it is larger than the sum of its proper divisors (8287627).

81470741 is a wasteful number, since it uses less digits than its factorization.

81470741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73443.

The product of its (nonzero) digits is 6272, while the sum is 32.

The square root of 81470741 is about 9026.1143910323. The cubic root of 81470741 is about 433.5114328399.

The spelling of 81470741 in words is "eighty-one million, four hundred seventy thousand, seven hundred forty-one".