81341707 has 4 divisors (see below), whose sum is σ = 82720440. Its totient is φ = 79962976.

The previous prime is 81341683. The next prime is 81341747. The reversal of 81341707 is 70714318.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 81341707 - 2¹⁹ = 80817419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81341747) 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 3 ways as a sum of consecutive naturals, for example, 689278 + ... + 689395.

It is an arithmetic number, because the mean of its divisors is an integer number (20680110).

Almost surely, 2^81341707 is an apocalyptic number.

81341707 is a deficient number, since it is larger than the sum of its proper divisors (1378733).

81341707 is a wasteful number, since it uses less digits than its factorization.

81341707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1378732.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 81341707 is about 9018.9637431359. The cubic root of 81341707 is about 433.2824456351.

The spelling of 81341707 in words is "eighty-one million, three hundred forty-one thousand, seven hundred seven".