81744001 has 8 divisors (see below), whose sum is σ = 85866624. Its totient is φ = 77668800.

The previous prime is 81743999. The next prime is 81744029. The reversal of 81744001 is 10044718.

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 81744001 - 2¹ = 81743999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81744031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8296 + ... + 15241.

It is an arithmetic number, because the mean of its divisors is an integer number (10733328).

Almost surely, 2^81744001 is an apocalyptic number.

It is an amenable number.

81744001 is a deficient number, since it is larger than the sum of its proper divisors (4122623).

81744001 is a wasteful number, since it uses less digits than its factorization.

81744001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23711.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 81744001 is about 9041.2389084682. The cubic root of 81744001 is about 433.9955703994.

Adding to 81744001 its reverse (10044718), we get a palindrome (91788719).

The spelling of 81744001 in words is "eighty-one million, seven hundred forty-four thousand, one".