81341677 has 4 divisors (see below), whose sum is σ = 81486720. Its totient is φ = 81196636.

The previous prime is 81341671. The next prime is 81341683. The reversal of 81341677 is 77614318.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (81341671) and next prime (81341683).

It is a cyclic number.

It is not a de Polignac number, because 81341677 - 2³ = 81341669 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 (81341671) 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, 71677 + ... + 72802.

It is an arithmetic number, because the mean of its divisors is an integer number (20371680).

Almost surely, 2^81341677 is an apocalyptic number.

It is an amenable number.

81341677 is a deficient number, since it is larger than the sum of its proper divisors (145043).

81341677 is a wasteful number, since it uses less digits than its factorization.

81341677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145042.

The product of its digits is 28224, while the sum is 37.

The square root of 81341677 is about 9018.9620799735. The cubic root of 81341677 is about 433.2823923682.

The spelling of 81341677 in words is "eighty-one million, three hundred forty-one thousand, six hundred seventy-seven".