81741394 has 16 divisors (see below), whose sum is σ = 140370048. Its totient is φ = 34971552.

The previous prime is 81741383. The next prime is 81741397. The reversal of 81741394 is 49314718.

It is not an unprimeable number, because it can be changed into a prime (81741397) 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, 3907 + ... + 13369.

It is an arithmetic number, because the mean of its divisors is an integer number (8773128).

Almost surely, 2^81741394 is an apocalyptic number.

81741394 is a deficient number, since it is larger than the sum of its proper divisors (58628654).

81741394 is a wasteful number, since it uses less digits than its factorization.

81741394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10089.

The product of its digits is 24192, while the sum is 37.

The square root of 81741394 is about 9041.0947345993. The cubic root of 81741394 is about 433.9909566522.

The spelling of 81741394 in words is "eighty-one million, seven hundred forty-one thousand, three hundred ninety-four".