81407341 has 4 divisors (see below), whose sum is σ = 81495900. Its totient is φ = 81318784.

The previous prime is 81407329. The next prime is 81407351. The reversal of 81407341 is 14370418.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2019241 + 79388100 = 1421^2 + 8910^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81407341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81407351) 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, 42886 + ... + 44743.

It is an arithmetic number, because the mean of its divisors is an integer number (20373975).

Almost surely, 2^81407341 is an apocalyptic number.

It is an amenable number.

81407341 is a deficient number, since it is larger than the sum of its proper divisors (88559).

81407341 is an equidigital number, since it uses as much as digits as its factorization.

81407341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88558.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 81407341 is about 9022.6016757917. The cubic root of 81407341 is about 433.3989517331.

Adding to 81407341 its reverse (14370418), we get a palindrome (95777759).

The spelling of 81407341 in words is "eighty-one million, four hundred seven thousand, three hundred forty-one".