81343754 has 32 divisors (see below), whose sum is σ = 128894976. Its totient is φ = 38465280.

The previous prime is 81343747. The next prime is 81343763. The reversal of 81343754 is 45734318.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 640439 + ... + 640565.

It is an arithmetic number, because the mean of its divisors is an integer number (4027968).

Almost surely, 2^81343754 is an apocalyptic number.

81343754 is a deficient number, since it is larger than the sum of its proper divisors (47551222).

81343754 is a wasteful number, since it uses less digits than its factorization.

81343754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350.

The product of its digits is 40320, while the sum is 35.

The square root of 81343754 is about 9019.0772255259. The cubic root of 81343754 is about 433.2860801860.

The spelling of 81343754 in words is "eighty-one million, three hundred forty-three thousand, seven hundred fifty-four".