81343762 has 8 divisors (see below), whose sum is σ = 123836976. Its totient is φ = 40064772.

The previous prime is 81343747. The next prime is 81343763. The reversal of 81343762 is 26734318.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (81343763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303388 + ... + 303655.

It is an arithmetic number, because the mean of its divisors is an integer number (15479622).

Almost surely, 2^81343762 is an apocalyptic number.

81343762 is a deficient number, since it is larger than the sum of its proper divisors (42493214).

81343762 is a wasteful number, since it uses less digits than its factorization.

81343762 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607112.

The product of its digits is 24192, while the sum is 34.

The square root of 81343762 is about 9019.0776690302. The cubic root of 81343762 is about 433.2860943903.

The spelling of 81343762 in words is "eighty-one million, three hundred forty-three thousand, seven hundred sixty-two".